diff --git a/VerteronDisassemblerEngine/VXInstructionFormatter.c b/VerteronDisassemblerEngine/VXInstructionFormatter.c
index 4613095..13f7643 100644
--- a/VerteronDisassemblerEngine/VXInstructionFormatter.c
+++ b/VerteronDisassemblerEngine/VXInstructionFormatter.c
@@ -75,8 +75,6 @@ static void VXBaseSymbolResolver_Destruct(VXBaseSymbolResolverContext *ctx);
 
 typedef void(*VXBaseInstructionFormatter_DestructionCallback)(
     VXBaseInstructionFormatterContext *ctx);
-typedef void(*VXBaseInstructionFormatter_InternalFormatInstructionCallback)(
-    VXBaseInstructionFormatterContext *ctx, const VXInstructionInfo *info);
 
 typedef struct _VXBaseInstructionFormatter
 {
@@ -263,6 +261,27 @@ static void VXIntelInstructionFormatter_FormatOperand(VXBaseInstructionFormatter
 static void VXIntelInstructionFormatter_InternalFormatInstruction(
     VXBaseInstructionFormatterContext *ctx, const VXInstructionInfo *info);
 
+/* VXCustomInstructionFormatter ---------------------------------------------------------------- */
+
+typedef struct _VXCustomInstructionFormatter
+{
+    VXBaseInstructionFormatter super;
+} VXCustomInstructionFormatter;
+
+/**
+ * @brief   Contructor.
+ * @param   ctx             The context.
+ * @param   formatInsnCb    The callback formatting the instruction.
+ */
+static void VXCustomInstructionFormatter_Construct(VXBaseInstructionFormatterContext *ctx,
+    VXBaseInstructionFormatter_InternalFormatInstructionCallback formatInsnCb);
+
+/**
+ * @brief   Destructor.
+ * @param   ctx The context.
+ */
+static void VXCustomInstructionFormatter_Destruct(VXBaseInstructionFormatterContext *ctx);
+
 /* Implementation ============================================================================== */
 
 /* VXBaseSymbolResolver ------------------------------------------------------------------------ */
@@ -1069,6 +1088,49 @@ static void VXIntelInstructionFormatter_InternalFormatInstruction(
     }
 }
 
+/* VXCustomInstructionFormatter ---------------------------------------------------------------- */
+
+static void VXCustomInstructionFormatter_Construct(VXBaseInstructionFormatterContext *ctx,
+    VXBaseInstructionFormatter_InternalFormatInstructionCallback formatInsnCb)
+{
+    VXBaseInstructionFormatter_Construct(ctx, NULL);
+
+    VXCustomInstructionFormatter *thiz = VXCustomInstructionFormatter_thiz(ctx);
+    thiz->super.internalFormat = formatInsnCb;
+}
+
+static void VXCustomInstructionFormatter_Destruct(VXBaseInstructionFormatterContext *ctx)
+{
+    VXBaseInstructionFormatter_Destruct(ctx);
+}
+
+VX_EXPORT VXBaseInstructionFormatterContext* VXCustomInstructionFormatter_Create(
+    VXBaseInstructionFormatter_InternalFormatInstructionCallback formatInsnCb)
+{
+    VXCustomInstructionFormatter *thiz = malloc(sizeof(VXCustomInstructionFormatter));
+    VXBaseInstructionFormatterContext *ctx = malloc(sizeof(VXBaseInstructionFormatterContext));
+
+    if (!thiz || !ctx)
+    {
+        if (thiz)
+        {
+            free(thiz);
+        }
+        if (ctx)
+        {
+            free(ctx);
+        }
+
+        return NULL;
+    }
+
+    ctx->d.type = TYPE_CUSTOMINSTRUCTIONFORMATTER;
+    ctx->d.ptr  = thiz;
+
+    VXCustomInstructionFormatter_Construct(ctx, formatInsnCb);
+    return ctx;
+}
+
 /* --------------------------------------------------------------------------------------------- */
 
 /* ============================================================================================= */
diff --git a/VerteronDisassemblerEngine/VXInstructionFormatter.h b/VerteronDisassemblerEngine/VXInstructionFormatter.h
index 43729e6..42b2c03 100644
--- a/VerteronDisassemblerEngine/VXInstructionFormatter.h
+++ b/VerteronDisassemblerEngine/VXInstructionFormatter.h
@@ -97,6 +97,9 @@ typedef struct _VXBaseInstructionFormatterContext
     VXContextDescriptor d;
 } VXBaseInstructionFormatterContext;
 
+typedef void(*VXBaseInstructionFormatter_InternalFormatInstructionCallback)(
+    VXBaseInstructionFormatterContext *ctx, const VXInstructionInfo *info);
+
 /**
  * @brief   Formats a decoded instruction.
  * @param   ctx     The instruction formatter context.
@@ -134,7 +137,7 @@ VX_EXPORT void VXBaseInstructionFormatter_SetSymbolResolver(
 VX_EXPORT void VXBaseInstructionFormatter_Release(
     VXBaseInstructionFormatterContext *ctx);
 
-/* VXIntelInstructionFormatter ================================================================ */
+/* VXIntelInstructionFormatter ================================================================= */
 
 /**
  * @brief   Creates an Intel-syntax instruction formatter.
@@ -152,6 +155,16 @@ VX_EXPORT VXBaseInstructionFormatterContext* VXIntelInstructionFormatter_Create(
 VX_EXPORT VXBaseInstructionFormatterContext* VXIntelInstructionFormatter_CreateEx(
     VXBaseSymbolResolverContext *resolver);
 
+/* VXCustomInstructionFormatter ================================================================ */
+
+/**
+ * @brief   Creats a custom instruction formatter.
+ * @param   formatInsnCb    The callback formatting the instruction.
+ * @return  @c NULL if it fails, else a custom instruction formatter context.
+ */
+VX_EXPORT VXBaseInstructionFormatterContext* VXCustomInstructionFormatter_Create(
+    VXBaseInstructionFormatter_InternalFormatInstructionCallback formatInsnCb);
+
 /* ============================================================================================= */
 
 #ifdef __cplusplus
diff --git a/VerteronDisassemblerEngine/VXInternalHelpers.h b/VerteronDisassemblerEngine/VXInternalHelpers.h
index e310bbe..1389f85 100644
--- a/VerteronDisassemblerEngine/VXInternalHelpers.h
+++ b/VerteronDisassemblerEngine/VXInternalHelpers.h
@@ -51,6 +51,7 @@ typedef enum _VXTypeId
     TYPE_CUSTOMSYMBOLRESOLVER,
     TYPE_BASEINSTRUCTIONFORMATTER,
     TYPE_INTELINSTRUCTIONFORMATTER,
+    TYPE_CUSTOMINSTRUCTIONFORMATTER,
 } VXTypeId;
 
 /* Context conversion helpers ================================================================== */
@@ -149,7 +150,8 @@ VX_INLINE struct _VXBaseInstructionFormatter* VXBaseInstructionFormatter_thiz(
     VXBaseInstructionFormatterContext *ctx)
 {
     assert(ctx->d.type == TYPE_BASEINSTRUCTIONFORMATTER 
-        || ctx->d.type == TYPE_INTELINSTRUCTIONFORMATTER);
+        || ctx->d.type == TYPE_INTELINSTRUCTIONFORMATTER
+        || ctx->d.type == TYPE_CUSTOMINSTRUCTIONFORMATTER);
     return (struct _VXBaseInstructionFormatter*)ctx->d.ptr;
 }
 
@@ -157,7 +159,8 @@ VX_INLINE const struct _VXBaseInstructionFormatter* VXBaseInstructionFormatter_c
     const VXBaseInstructionFormatterContext *ctx)
 {
     assert(ctx->d.type == TYPE_BASEINSTRUCTIONFORMATTER
-        || ctx->d.type == TYPE_INTELINSTRUCTIONFORMATTER);
+        || ctx->d.type == TYPE_INTELINSTRUCTIONFORMATTER
+        || ctx->d.type == TYPE_CUSTOMINSTRUCTIONFORMATTER);
     return (const struct _VXBaseInstructionFormatter*)ctx->d.ptr;
 }
 
@@ -175,6 +178,20 @@ VX_INLINE const struct _VXIntelInstructionFormatter* VXIntelInstructionFormatter
     return (const struct _VXIntelInstructionFormatter*)ctx->d.ptr;
 }
 
+VX_INLINE struct _VXCustomInstructionFormatter* VXCustomInstructionFormatter_thiz(
+    VXBaseInstructionFormatterContext *ctx)
+{
+    assert(ctx->d.type == TYPE_CUSTOMINSTRUCTIONFORMATTER);
+    return (struct _VXCustomInstructionFormatter*)ctx->d.ptr;
+}
+
+VX_INLINE const struct _VXCustomInstructionFormatter* VXCustomInstructionFormatter_cthiz(
+    const VXBaseInstructionFormatterContext *ctx)
+{
+    assert(ctx->d.type == TYPE_CUSTOMINSTRUCTIONFORMATTER);
+    return (struct _VXCustomInstructionFormatter*)ctx->d.ptr;
+}
+
 /* ============================================================================================= */
 
 #endif /* _VDE_VXINTERNALHELPERS_H_ */
\ No newline at end of file