diff --git a/Makefile b/Makefile
index 9dc8be68c..2641e6107 100644
--- a/Makefile
+++ b/Makefile
@@ -134,7 +134,7 @@ pedantic_clang:
 
 # calling GCC with most warnings
 pedantic_gcc:
-	$(MAKE) json_unit CXX=g++-9 CXXFLAGS=" \
+	$(MAKE) json_unit CXX=/usr/local/bin/g++-9 CXXFLAGS=" \
 		-std=c++11 \
 		-Waddress \
 		-Waddress-of-packed-member \