diff --git a/reactos/include/crt/_mingw.h b/reactos/include/crt/_mingw.h
index 4ee69fcb46b..203ac566271 100644
--- a/reactos/include/crt/_mingw.h
+++ b/reactos/include/crt/_mingw.h
@@ -217,7 +217,8 @@ allow GCC to optimize away some EH unwind code, at least in DW2 case.  */
 
 /* Define to a function attribute for Microsoft hotpatch assembly prefix. */
 #ifndef DECLSPEC_HOTPATCH
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(__clang__)
+/* FIXME: http://llvm.org/bugs/show_bug.cgi?id=20888 */
 #define DECLSPEC_HOTPATCH
 #else
 #define DECLSPEC_HOTPATCH __attribute__((__ms_hook_prologue__))
diff --git a/reactos/include/reactos/wine/config.h b/reactos/include/reactos/wine/config.h
index 837445dd903..25b7d071a31 100644
--- a/reactos/include/reactos/wine/config.h
+++ b/reactos/include/reactos/wine/config.h
@@ -2,7 +2,8 @@
 
 /* Define to a function attribute for Microsoft hotpatch assembly prefix. */
 #ifndef DECLSPEC_HOTPATCH
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(__clang__)
+/* FIXME: http://llvm.org/bugs/show_bug.cgi?id=20888 */
 #define DECLSPEC_HOTPATCH
 #else
 #define DECLSPEC_HOTPATCH __attribute__((__ms_hook_prologue__))