diff --git a/Makefile b/Makefile
index 6ada38d..f79c7a9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 test : test.cpp
-	gcc -O3 -lstdc++ -o test test.cpp
+	g++ -O3 -lstdc++ -o test test.cpp group_huffman.cpp
 
 check : test
 	./test postings.bin