diff --git a/lib/clang/clang.build.mk b/lib/clang/clang.build.mk
--- a/lib/clang/clang.build.mk
+++ b/lib/clang/clang.build.mk
@@ -13,4 +13,6 @@
 CFLAGS+=	-DCLANG_ENABLE_STATIC_ANALYZER
 .endif
 
+CFLAGS.gcc+=	-fno-strict-aliasing
+
 .include "llvm.build.mk"