diff --git a/gnu/usr.bin/cc/include/Makefile b/gnu/usr.bin/cc/include/Makefile
index 357bac06defd..928579548769 100644
--- a/gnu/usr.bin/cc/include/Makefile
+++ b/gnu/usr.bin/cc/include/Makefile
@@ -9,7 +9,8 @@ INCSDIR=${INCLUDEDIR}/gcc/${GCCVER}
 .PATH: ${GCCDIR}/config/${GCC_CPU}
 
 .if ${TARGET_ARCH} == "i386" || ${TARGET_ARCH} == "amd64"
-INCS=	emmintrin.h mmintrin.h pmmintrin.h tmmintrin.h xmmintrin.h mm_malloc.h
+INCS=	emmintrin.h mmintrin.h mm3dnow.h pmmintrin.h tmmintrin.h xmmintrin.h \
+	mm_malloc.h
 .elif ${TARGET_ARCH} == "ia64"
 INCS=	ia64intrin.h
 .elif ${TARGET_ARCH} == "arm"