diff --git a/lib/libc/minimal/source/stdout/prf.c b/lib/libc/minimal/source/stdout/prf.c
index 157634b..95ae07d 100644
--- a/lib/libc/minimal/source/stdout/prf.c
+++ b/lib/libc/minimal/source/stdout/prf.c
@@ -160,12 +160,12 @@
 	/* Usage in this file wants rounded behavior, not truncation.  So add
 	 * two to get the threshold right.
 	 */
-	rem += 2;
+	rem += 2U;
 
 	for (i = 0U; i < 3; i++) {
 		hi = rem >> shifts[i];
-		q = (uint64_t)(hi / 5) << shifts[i];
-		rem -= q * 5;
+		q = (uint64_t)(hi / 5U) << shifts[i];
+		rem -= q * 5U;
 		quot += q;
 	}
 
@@ -178,7 +178,7 @@
 
 	if (*digit_count > 0) {
 		*digit_count -= 1;
-		*fr = *fr * 10;
+		*fr = *fr * 10U;
 		rval = ((*fr >> 60) & 0xF) + '0';
 		*fr &= 0x0FFFFFFFFFFFFFFFull;
 	} else {
@@ -287,7 +287,7 @@
 			_rlrshift(&fract);
 			exp++;
 		}
-		fract *= 5;
+		fract *= 5U;
 		exp++;
 		decexp--;
 
diff --git a/lib/libc/minimal/source/string/string.c b/lib/libc/minimal/source/string/string.c
index 8685d4a..a974227 100644
--- a/lib/libc/minimal/source/string/string.c
+++ b/lib/libc/minimal/source/string/string.c
@@ -240,7 +240,7 @@
 	unsigned char *d_byte = (unsigned char *)d;
 	const unsigned char *s_byte = (const unsigned char *)s;
 
-	if ((((unsigned int)d ^ (unsigned int)s_byte) & 0x3) == 0) {
+	if ((((unsigned int)d ^ (unsigned int)s_byte) & 0x3) == 0U) {
 
 		/* do byte-sized copying until word-aligned or finished */