diff --git a/libexec/dma/Makefile b/libexec/dma/Makefile
index a4884afefbd3..757faf4a3c34 100644
--- a/libexec/dma/Makefile
+++ b/libexec/dma/Makefile
@@ -31,4 +31,10 @@ CLEANFILES=	aliases_parse.i
 BINGRP=	mail
 BINMODE=	2555
 
+.include <bsd.compiler.mk>
+
+.if ${COMPILER_TYPE} == gcc
+WARNS=	5
+.endif
+
 .include <bsd.prog.mk>