diff --git a/src/graphics.cpp b/src/graphics.cpp
index 02b172e..6730c6e 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -19,6 +19,7 @@
 #include <config.hpp>
 #include <cv.hpp>
 #include <args.hpp>
+#include <error.hpp>
 
 GLuint shader;	//standard shader program used for all elements
 GLuint transUniform;	//location of the "transMatrix" transformation matrix uniform in the shader