diff --git a/alib2cli/src/grammar/AltCliLexer.g4 b/alib2cli/src/grammar/AltCliLexer.g4
index 9a420bdcf8b60c4f96570d339eaa98e1e846b52c..c94ddd9801e28f54778639a1832d2dd2509bcaaa 100644
--- a/alib2cli/src/grammar/AltCliLexer.g4
+++ b/alib2cli/src/grammar/AltCliLexer.g4
@@ -122,7 +122,7 @@ INTEGER : [0-9]+;
 //FILE : ([0-9] | [a-z] | [A-Z] | '/' | '.' | '-' | '~' | '~' | '_' | ':' | '\\')+ ;
 
 // TODO: Id
-IDENTIFIER  : ([a-z] | [A-Z] | '_' | ':' ) ([0-9] | [a-z] | [A-Z] | '_' | ':' )* ;
+IDENTIFIER  : ([a-z] | [A-Z] | '_' ) ([0-9] | [a-z] | [A-Z] | '_' | ':' )* ;
 
 
 STRING  : DQUOTE ( STR_TEXT | EOL )* DQUOTE ;
diff --git a/alib2cli/test-src/aql/basic/execute6.aql b/alib2cli/test-src/aql/basic/execute6.aql
new file mode 100644
index 0000000000000000000000000000000000000000..a73a4ba0ab2b489980b9496c788f0d5f307c6734
--- /dev/null
+++ b/alib2cli/test-src/aql/basic/execute6.aql
@@ -0,0 +1 @@
+execute <:int #2
\ No newline at end of file