diff --git a/config.mk b/config.mk
index 3001240..06bf870 100644
--- a/config.mk
+++ b/config.mk
@@ -11,7 +11,7 @@ X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
 # includes and libs
-INCS = -I/usr/include -I${X11INC}
+INCS = _I. -I/usr/include -I${X11INC}
 LIBS = -L/usr/lib -lc -L${X11LIB} -lX11
 
 # flags