diff --git a/src/tokenizer.cpp b/src/tokenizer.cpp
index 84d1d905180838d3659fabe0abdec4b3f897af18..ebe1b07359c5f82211763c0b11d65a561e276724 100644
--- a/src/tokenizer.cpp
+++ b/src/tokenizer.cpp
@@ -92,10 +92,9 @@
     case 'c'
 
 #define SYMBOL_CHAR \
-    ALPHA_EXCEPT_C: \
+    ALPHA: \
     case DIGIT: \
-    case '_': \
-    case 'c'
+    case '_'
 
 #define SYMBOL_START \
     ALPHA: \