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-rw-r--r--dlfcn/glrefmain.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/dlfcn/glrefmain.c b/dlfcn/glrefmain.c
index efb080a261..38408c227a 100644
--- a/dlfcn/glrefmain.c
+++ b/dlfcn/glrefmain.c
@@ -35,6 +35,8 @@ load (const char *name)
 
 
 #define TEST_FUNCTION do_test ()
+extern int do_test (void);
+
 int
 do_test (void)
 {