diff --git a/matchers.go b/matchers.go
index 0c30aa1..ad04ab6 100644
--- a/matchers.go
+++ b/matchers.go
@@ -176,7 +176,7 @@
 }
 
 //ContainSubstring succeeds if actual is a string or stringer that contains the
-//passed-in regexp.  Optional arguments can be provided to construct the substring
+//passed-in substring.  Optional arguments can be provided to construct the substring
 //via fmt.Sprintf().
 func ContainSubstring(substr string, args ...interface{}) types.GomegaMatcher {
 	return &matchers.ContainSubstringMatcher{