diff --git a/m4/a52.m4 b/m4/a52.m4
index 6f476af80d..0065deeb15 100644
--- a/m4/a52.m4
+++ b/m4/a52.m4
@@ -95,8 +95,7 @@ main ()
 int 
 main ()
 {
-  a52_state_t *state;
-  int i = sizeof (state);
+  int i = sizeof (a52_state_t);
   if ( i )
     return 0;
 }