diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index d0514308083ca74e54c6089c503dba6b7e9b56ec..f441fab00fdd0219a00cc7bd9de46fb427311e30 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -7446,7 +7446,7 @@ branch_positive_comparison_operator (rtx op, enum machine_mode mode)
 {
   enum rtx_code code;
 
-  if (! branch_comparison_operator (rtx op, enum machine_mode mode))
+  if (! branch_comparison_operator (op, mode))
     return 0;
 
   code = GET_CODE (op);