diff --git a/dtool/src/parser-inc/ft2build.h b/dtool/src/parser-inc/ft2build.h
index bbe59d244b..5757d13984 100644
--- a/dtool/src/parser-inc/ft2build.h
+++ b/dtool/src/parser-inc/ft2build.h
@@ -32,6 +32,7 @@ class FT_Face;
 class FT_Library;
 class FT_Bitmap;
 class FT_Vector;
+class FT_Span;
 
 #endif