diff --git a/lib/clang/llvm.build.mk b/lib/clang/llvm.build.mk
index 91b4e4d83aba..71c0b17d4fdf 100644
--- a/lib/clang/llvm.build.mk
+++ b/lib/clang/llvm.build.mk
@@ -17,7 +17,7 @@ CFLAGS+=	-I${LLVM_SRCS}/include
 CFLAGS+=	-DLLVM_BUILD_GLOBAL_ISEL
 CFLAGS+=	-D__STDC_LIMIT_MACROS
 CFLAGS+=	-D__STDC_CONSTANT_MACROS
-CFLAGS+=	-DNDEBUG
+#CFLAGS+=	-DNDEBUG
 
 TARGET_ARCH?=	${MACHINE_ARCH}
 BUILD_ARCH?=	${MACHINE_ARCH}