diff --git a/src/basic/terminal-util.h b/src/basic/terminal-util.h
index d008d0456c..fa771230ff 100644
--- a/src/basic/terminal-util.h
+++ b/src/basic/terminal-util.h
@@ -165,7 +165,7 @@ int pty_open_peer(int fd, int mode);
 static inline bool osc_char_is_valid(char c) {
         /* Checks whether the specified character is safe to be included inside an ANSI OSC sequence, as per
          * ECMA-48 5th edition, section 8.3.89 */
-        return (unsigned char) c >= 32U && (unsigned char) c < 127;
+        return (unsigned char) c >= 32 && (unsigned char) c < 127;
 }
 
 static inline bool vtnr_is_valid(unsigned n) {