diff --git a/Makefile b/Makefile
index 55e59ec..7be6e66 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ CXXFLAGS += $(DEBUG)
 # Sources
 SRC = main.cpp
 
-INC_DIR =
+INC_DIR = include/core
 
 CPPFLAGS = $(addprefix -I, $(INC_DIR)) -MMD -MP