diff --git a/src/renderer.c b/src/renderer.c
index ff01c57b..d5e86d47 100644
--- a/src/renderer.c
+++ b/src/renderer.c
@@ -19,6 +19,7 @@ struct GlyphSet {
 typedef struct GlyphSet GlyphSet;
 
 struct RenFont {
+  void *data;
   GlyphSet *sets[MAX_GLYPHSET];
   float size;
   int height;