diff --git a/miext/sync/meson.build b/miext/sync/meson.build
index 1c959d60bc..a7c7eca388 100644
--- a/miext/sync/meson.build
+++ b/miext/sync/meson.build
@@ -10,7 +10,7 @@ hdrs_miext_sync = [
     'misyncstr.h',
 ]
 
-if build_dri3
+if xshmfence_dep.found()
     srcs_miext_sync += 'misyncshm.c'
 endif