diff --git a/regex/matching.go b/regex/matching.go
index b82a60f..f6f73b5 100644
--- a/regex/matching.go
+++ b/regex/matching.go
@@ -142,7 +142,7 @@ func pruneIndices(indices []Match) []Match {
 // the regex, in the given string. The return value will be an empty string in two situations:
 //  1. No match was found
 //  2. The match was an empty string
-func FindString(regex Reg, str string) string {
+func (regex Reg) FindString(str string) string {
 	match, err := FindNthMatch(regex, str, 1)
 	if err != nil {
 		return ""
diff --git a/regex/re_test.go b/regex/re_test.go
index 80ba6e9..e319b0e 100644
--- a/regex/re_test.go
+++ b/regex/re_test.go
@@ -704,7 +704,7 @@ func TestFindString(t *testing.T) {
 					panic(err)
 				}
 			} else {
-				foundString := FindString(regComp, test.str)
+				foundString := regComp.FindString(test.str)
 				if len(test.result) == 0 {
 					if foundString != "" {
 						t.Errorf("Expected no match got %v\n", foundString)