diff --git a/src/Makefile b/src/Makefile
index cb6a3c3..0bb3ca7 100755
--- a/src/Makefile
+++ b/src/Makefile
@@ -9,7 +9,7 @@ $(libname): $(o)
 
 
 %.o: %.cpp
-	$(CXX) -c $(CXXFLAGS) $<
+	$(CXX) -c $(CXXFLAGS) -I../../pikotools $<
 
 
 depend: