diff --git a/src/acl.c b/src/acl.c
index aa42c58dc..07840406a 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -1990,7 +1990,8 @@ sds *ACLMergeSelectorArguments(sds *argv, int argc, int *merged_argc, int *inval
     for (int j = 0; j < argc; j++) {
         char *op = argv[j];
 
-        if (op[0] == '(' && op[sdslen(op) - 1] != ')') {
+        if (open_bracket_start == -1 &&
+            (op[0] == '(' && op[sdslen(op) - 1] != ')')) {
             selector = sdsdup(argv[j]);
             open_bracket_start = j;
             continue;
diff --git a/tests/unit/acl-v2.tcl b/tests/unit/acl-v2.tcl
index af23d745e..b259c2716 100644
--- a/tests/unit/acl-v2.tcl
+++ b/tests/unit/acl-v2.tcl
@@ -47,6 +47,15 @@ start_server {tags {"acl external:skip"}} {
         catch {r ACL SETUSER selector-syntax on (&* &fail)} e
         assert_match "*ERR Error in ACL SETUSER modifier '(*)*Adding a pattern after the*" $e
 
+        catch {r ACL SETUSER selector-syntax on (+PING (+SELECT (+DEL} e
+        assert_match "*ERR Unmatched parenthesis in acl selector*" $e
+
+        catch {r ACL SETUSER selector-syntax on (+PING (+SELECT (+DEL ) ) ) } e
+        assert_match "*ERR Error in ACL SETUSER modifier*" $e
+
+        catch {r ACL SETUSER selector-syntax on (+PING (+SELECT (+DEL ) } e
+        assert_match "*ERR Error in ACL SETUSER modifier*" $e
+
         assert_equal "" [r ACL GETUSER selector-syntax]
     }