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-rw-r--r--src/sciteco.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sciteco.h b/src/sciteco.h
index 09dea3b..02eed97 100644
--- a/src/sciteco.h
+++ b/src/sciteco.h
@@ -71,7 +71,7 @@ teco_is_failure(teco_bool_t x)
#endif
/** TRUE if C is a control character */
-#define TECO_IS_CTL(C) ((guchar)(C) < ' ')
+#define TECO_IS_CTL(C) ((gunichar)(C) < ' ')
/** ASCII character to echo control character C */
#define TECO_CTL_ECHO(C) ((C) | 0x40)
/**