diff --git a/httpr.go b/httpr.go
index 18d2185..d36908d 100644
--- a/httpr.go
+++ b/httpr.go
@@ -114,6 +114,14 @@ outer:
 		for _, child := range curNode.children {
 			firstChar := path[i+1][0]
 			if (firstChar == ':' || firstChar == '*') && firstChar == child.endpoint[0] {
+				// Do not allow different param names, because only the first one
+				// is saved, so a param won't be available by a new name.
+				//
+				// I am not the one to judge, but it is a little strange to
+				// expect different types of param in one place.
+				if path[i+1] != child.endpoint {
+					return errors.New("param names " + path[i+1] + " and " + child.endpoint + " are differ")
+				}
 				curNode = child
 				continue outer
 			}