diff --git a/compiler-rt/lib/builtins/assembly.h b/compiler-rt/lib/builtins/assembly.h
index 79a45d9143b4..d28f73f14b0c 100644
--- a/compiler-rt/lib/builtins/assembly.h
+++ b/compiler-rt/lib/builtins/assembly.h
@@ -337,7 +337,7 @@
 #endif
 #endif
 
-#if defined(__i386__) || defined(__amd64__)
+#if defined(__ASSEMBLER__) && (defined(__i386__) || defined(__amd64__))
 .att_syntax
 #endif