diff --git a/src/misc2.c b/src/misc2.c
index 084d451..72a0343 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -3860,7 +3860,7 @@
     ush temp; \
  \
     temp = (ush)keys[2] | 2; \
-    t = (int)(((unsigned)(temp * (temp ^ 1)) >> 8) & 0xff); \
+    t = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff); \
 }
 
 /*
@@ -4002,7 +4002,7 @@
 	    ush temp;
 
 	    temp = (ush)keys[2] | 2;
-	    temp = (int)(((unsigned)(temp * (temp ^ 1)) >> 8) & 0xff);
+	    temp = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff);
 	    UPDATE_KEYS_ZIP(*p ^= temp);
 	}
     else