diff --git a/libafl_targets/src/common.h b/libafl_targets/src/common.h
index e2695fe16d..815ca4906c 100644
--- a/libafl_targets/src/common.h
+++ b/libafl_targets/src/common.h
@@ -62,6 +62,15 @@
                                Name) "=" WIN_SYM_PREFIX STRINGIFY(Default)))
 
 #define CHECK_WEAK_FN(Name) ((void*)Name != (void*)&Name##Def)
+
+#define EXT_FUNC_IMPL(NAME, RETURN_TYPE, FUNC_SIG, WARN) \
+  RETURN_TYPE NAME##Def FUNC_SIG;                           \
+  EXTERNAL_FUNC(NAME, NAME##Def) RETURN_TYPE NAME FUNC_SIG; \
+  RETURN_TYPE NAME##Def FUNC_SIG                            \
+
+#define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN)         \
+  RETURN_TYPE (*NAME##Def) FUNC_SIG = NULL;                 \
+  EXTERNAL_FUNC(NAME, NAME##Def) RETURN_TYPE NAME FUNC_SIG
 #else
 // Declare external functions as weak to allow them to default to a specified
 // function if not defined explicitly. We must use weak symbols because clang's
@@ -71,7 +80,6 @@
   __attribute__((weak, alias(STRINGIFY(Default))))
 
 #define CHECK_WEAK_FN(Name) (Name != NULL)
-#endif  // _MSC_VER
 
 #define EXT_FUNC_IMPL(NAME, RETURN_TYPE, FUNC_SIG, WARN) \
   EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN)
@@ -79,6 +87,8 @@
 #define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN)         \
   RETURN_TYPE (*NAME##Def) FUNC_SIG = NULL;                 \
   EXTERNAL_FUNC(NAME, NAME##Def) RETURN_TYPE NAME FUNC_SIG
+#endif  // _MSC_VER
+
 #else
 
 #if defined(__APPLE__)
@@ -103,6 +113,6 @@
 #endif
 
 #define CHECK_WEAK_FN(Name) (Name != NULL)
-#endif
+#endif // _WIN32
 
 #endif