diff --git a/Makefile b/Makefile
index df0e489a..3bc8d8e0 100644
--- a/Makefile
+++ b/Makefile
@@ -76,6 +76,7 @@ CXXFLAGS    := \
               -std=c++17 \
               $(STATIC_FLAGS) \
               $(LTO_FLAGS) \
+	      -Isrc \
               -Wall \
               -Wno-unused-result \
               -MMD