diff --git a/dev-ada/gps/gps-2017.ebuild b/dev-ada/gps/gps-2017.ebuild
index 542c7879a33c0..6156e0dde66c6 100644
--- a/dev-ada/gps/gps-2017.ebuild
+++ b/dev-ada/gps/gps-2017.ebuild
@@ -63,6 +63,7 @@ src_configure() {
 }
 
 src_compile() {
+	ADAFLAGS+=" -fno-strict-aliasing"
 	emake GPRBUILD_FLAGS="-v ${MAKEOPTS} \
 		-XLIBRARY_TYPE=relocatable \
 		-XXMLADA_BUILD=relocatable"