diff --git a/pcre.go b/pcre.go
index e6a4f28..d14e59c 100644
--- a/pcre.go
+++ b/pcre.go
@@ -662,8 +662,7 @@ func (r *Regexp) SetCallout(fn func(cb *CalloutBlock) int32) error {
 			}
 		}
 
-		x := fn(cb)
-		return x
+		return fn(cb)
 	}
 
 	r.calloutMtx.Lock()