diff --git a/ext/Makefile.am b/ext/Makefile.am
index 3d7c4b207a..e4e0db7d68 100644
--- a/ext/Makefile.am
+++ b/ext/Makefile.am
@@ -82,9 +82,8 @@ else
 DTS_DIR=
 endif
 
-# FIXME: re-enable for gl mixers
 if USE_GL
-#GL_DIR=gl
+GL_DIR=gl
 else
 GL_DIR=
 endif