diff --git a/el/sclang-language.el b/el/sclang-language.el
index 1a99e39..c59e02d 100644
--- a/el/sclang-language.el
+++ b/el/sclang-language.el
@@ -48,7 +48,7 @@ The expressions are joined as alternatives with the \\| operator."
   "Regular expression matching symbols.")
 
 (defconst sclang-identifier-regexp
-  (concat "[a-z]" sclang-symbol-regexp)
+  (concat "[a-zA-Z]" sclang-symbol-regexp)
   "Regular expression matching valid identifiers.")
 
 (defconst sclang-method-name-special-chars