diff --git a/ctype/_ctype.h b/ctype/_ctype.h
index fb20572..d052be0 100644
--- a/ctype/_ctype.h
+++ b/ctype/_ctype.h
@@ -6,4 +6,5 @@
 #define OPEN 32|SYMBOL
 #define CLOSE 64|SYMBOL
 #define SPACE 128
-#define HEXNUM 256|UPPER
\ No newline at end of file
+#define HEXNUM 256|UPPER
+extern ascii_table[256];
\ No newline at end of file