diff --git a/key-string.c b/key-string.c
index 5e806b81..65d669bf 100644
--- a/key-string.c
+++ b/key-string.c
@@ -154,7 +154,7 @@ key_string_lookup_string(const char *string)
 		if (modifiers & KEYC_CTRL) {
 			if (key >= 97 && key <= 122)
 				key -= 96;
-			else if (key >= 65 && key <= 90)
+			else if (key >= 64 && key <= 95)
 				key -= 64;
 			else if (key == 32)
 				key = 0;