diff --git a/Source/fault.cpp b/Source/fault.cpp
index b62f69f71..ba18c6b1e 100644
--- a/Source/fault.cpp
+++ b/Source/fault.cpp
@@ -242,9 +242,10 @@ char *__fastcall fault_get_error_type(DWORD dwMessageId, LPSTR lpString1, DWORD
 	return lpString1;
 }
 
-void __fastcall fault_set_filter(void *unused)
+void * __fastcall fault_set_filter(void *unused)
 {
 	lpTopLevelExceptionFilter = SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER)TopLevelExceptionFilter);
+	return unused;
 }
 
 LPTOP_LEVEL_EXCEPTION_FILTER __fastcall fault_reset_filter(void *unused)
diff --git a/Source/fault.h b/Source/fault.h
index cad8bb3bc..324f1e4e6 100644
--- a/Source/fault.h
+++ b/Source/fault.h
@@ -18,7 +18,7 @@ void __fastcall fault_hex_format(BYTE *ptr, unsigned int numBytes);
 void __fastcall fault_unknown_module(LPCVOID lpAddress, LPSTR lpModuleName, int iMaxLength, int *sectionNum, int *sectionOffset);
 void __fastcall fault_call_stack(void *instr, STACK_FRAME *stackAddr);
 char *__fastcall fault_get_error_type(DWORD dwMessageId, LPSTR lpString1, DWORD nSize);
-void __fastcall fault_set_filter(void *unused);
+void * __fastcall fault_set_filter(void *unused);
 LPTOP_LEVEL_EXCEPTION_FILTER __fastcall fault_reset_filter(void *unused);
 LPTOP_LEVEL_EXCEPTION_FILTER __cdecl fault_get_filter();