diff --git a/mock/mock.go b/mock/mock.go
index 9f24479cd..eb5682df9 100644
--- a/mock/mock.go
+++ b/mock/mock.go
@@ -1227,15 +1227,15 @@ func assertOpts(expected, actual interface{}) (expectedFmt, actualFmt string) {
 	}
 
 	for i := 0; i < expectedOpts.Len(); i++ {
-		expectedOpt := expectedOpts.Index(i).Interface()
-		actualOpt := actualOpts.Index(i).Interface()
-
 		if !isFuncSame(expectedFuncs[i], actualFuncs[i]) {
 			expectedFmt = expectedNames[i]
 			actualFmt = actualNames[i]
 			return
 		}
 
+		expectedOpt := expectedOpts.Index(i).Interface()
+		actualOpt := actualOpts.Index(i).Interface()
+
 		ot := reflect.TypeOf(expectedOpt)
 		var expectedValues []reflect.Value
 		var actualValues []reflect.Value