diff --git a/include/zxformat.h b/include/zxformat.h
index cacc036..8f5549b 100644
--- a/include/zxformat.h
+++ b/include/zxformat.h
@@ -22,7 +22,7 @@ extern "C" {
 #include "zxmacros.h"
 #include "zxerror.h"
 
-#define IS_PRINTABLE(c) ((c >= 0x20 && c <= 0x7e) || (c >= 0x80 && c <= 0xFF))
+#define IS_PRINTABLE(c) (c >= 0x20 && c <= 0x7e)
 
 #define NUM_TO_STR(TYPE) __Z_INLINE const char * TYPE##_to_str(char *data, int dataLen, TYPE##_t number) { \
     if (dataLen < 2) return "Buffer too small";     \
diff --git a/include/zxversion.h b/include/zxversion.h
index d80f7a1..dfac9c8 100644
--- a/include/zxversion.h
+++ b/include/zxversion.h
@@ -17,4 +17,4 @@
 
 #define ZXLIB_MAJOR     14
 #define ZXLIB_MINOR     1
-#define ZXLIB_PATCH     5
+#define ZXLIB_PATCH     6