diff --git a/source/extensions/m3_extensions.c b/source/extensions/m3_extensions.c
index 19ada7f..9d94662 100644
--- a/source/extensions/m3_extensions.c
+++ b/source/extensions/m3_extensions.c
@@ -110,3 +110,15 @@ IM3Function  m3_GetFunctionByIndex  (IM3Module i_module, uint32_t i_index)
 {
     return Module_GetFunction (i_module, i_index);
 }
+
+M3Result  m3_GetFunctionIndex  (IM3Function			i_function,
+								uint32_t * 	        o_index)
+{
+	if (i_function and o_index)
+	{
+		* o_index = i_function->index;
+		
+		return m3Err_none;
+	}
+	else return m3Err_functionLookupFailed;
+}
diff --git a/source/extensions/wasm3_ext.h b/source/extensions/wasm3_ext.h
index 437eef9..edea27c 100644
--- a/source/extensions/wasm3_ext.h
+++ b/source/extensions/wasm3_ext.h
@@ -30,8 +30,9 @@ extern "C" {
     // To overwrite an existing function, set io_functionIndex to the desired element. i_signature must match the existing
     // function signature.
     // ** InjectFunction invalidates any existing IM3Function pointers
-    M3Result            m3_InjectFunction           (IM3Module              i_module,
+    M3Result            m3_InjectFunction           (IM3Module              io_module,
                                                      int32_t *              io_functionIndex,
+//													 const char * const     i_name,
                                                      const char * const     i_signature,
                                                      const uint8_t * const  i_wasmBytes,            // i_wasmBytes is copied
                                                      bool                   i_doCompilation);
@@ -40,6 +41,9 @@ extern "C" {
     IM3Function         m3_GetFunctionByIndex       (IM3Module              i_module,
                                                      uint32_t               i_index);
 
+	M3Result 		    m3_GetFunctionIndex        	(IM3Function			i_function,
+													 uint32_t * 	        o_index);
+
 #if defined(__cplusplus)
 }
 #endif