diff --git a/src/main/java/cz/cvut/kbss/termit/rest/TermController.java b/src/main/java/cz/cvut/kbss/termit/rest/TermController.java
index bfe1f12f0..4331d6145 100644
--- a/src/main/java/cz/cvut/kbss/termit/rest/TermController.java
+++ b/src/main/java/cz/cvut/kbss/termit/rest/TermController.java
@@ -545,7 +545,7 @@ public List<TermDto> getAllRoots(@RequestParam(name = Constants.QueryParams.PAGE
      */
     @GetMapping(value = "/terms",
         produces = {MediaType.APPLICATION_JSON_VALUE, JsonLd.MEDIA_TYPE})
-    public List<TermDto> getAll(@RequestParam(required = false) String searchString) {
+    public List<TermDto> getAll(@RequestParam String searchString) {
         return termService.findAll(searchString);
     }
 }