diff --git a/panda/metalibs/pandagles2/Sources.pp b/panda/metalibs/pandagles2/Sources.pp
index 238a116808..ad6fd0e4dc 100644
--- a/panda/metalibs/pandagles2/Sources.pp
+++ b/panda/metalibs/pandagles2/Sources.pp
@@ -5,7 +5,7 @@
 // under Windows).
 
 #define DIR_TYPE metalib
-#define BUILDING_DLL BUILDING_PANDAGLES
+#define BUILDING_DLL BUILDING_PANDAGLES2
 #define BUILD_DIRECTORY $[HAVE_GLES2]
 
 #define COMPONENT_LIBS \