diff --git a/libmisc/gettime.c b/libmisc/gettime.c
index b2884022..5bdc71c1 100644
--- a/libmisc/gettime.c
+++ b/libmisc/gettime.c
@@ -55,7 +55,7 @@
 		fprintf (shadow_logfd,
 			 _("Environment variable $SOURCE_DATE_EPOCH: value must be smaller than or equal to %lu but was found to be: %llu\n"),
 			 ULONG_MAX, epoch);
-	} else if (epoch > fallback) {
+	} else if ((time_t)epoch > fallback) {
 		fprintf (shadow_logfd,
 			 _("Environment variable $SOURCE_DATE_EPOCH: value must be smaller than or equal to the current time (%lu) but was found to be: %llu\n"),
 			 fallback, epoch);
diff --git a/libmisc/idmapping.c b/libmisc/idmapping.c
index 30eb89fd..64985f82 100644
--- a/libmisc/idmapping.c
+++ b/libmisc/idmapping.c
@@ -199,7 +199,7 @@ void write_mapping(int proc_dir_fd, int ranges, const struct map_range *mappings
 			mapping->upper,
 			mapping->lower,
 			mapping->count);
-		if ((written <= 0) || (written >= (bufsize - (pos - buf)))) {
+		if ((written <= 0) || ((size_t)written >= (bufsize - (pos - buf)))) {
 			fprintf(log_get_logfd(), _("%s: snprintf failed!\n"), log_get_progname());
 			exit(EXIT_FAILURE);
 		}
diff --git a/src/newgidmap.c b/src/newgidmap.c
index 5b42431b..01d0fe90 100644
--- a/src/newgidmap.c
+++ b/src/newgidmap.c
@@ -175,7 +175,7 @@ int main(int argc, char **argv)
 	/* max string length is 6 + 10 + 1 + 1 = 18, allocate 32 bytes */
 	written = snprintf(proc_dir_name, sizeof(proc_dir_name), "/proc/%u/",
 		target);
-	if ((written <= 0) || (written >= sizeof(proc_dir_name))) {
+	if ((written <= 0) || ((size_t)written >= sizeof(proc_dir_name))) {
 		fprintf(stderr, "%s: snprintf of proc path failed: %s\n",
 			Prog, strerror(errno));
 	}
diff --git a/src/newuidmap.c b/src/newuidmap.c
index 546856a2..e8798409 100644
--- a/src/newuidmap.c
+++ b/src/newuidmap.c
@@ -104,7 +104,7 @@ int main(int argc, char **argv)
 	/* max string length is 6 + 10 + 1 + 1 = 18, allocate 32 bytes */
 	written = snprintf(proc_dir_name, sizeof(proc_dir_name), "/proc/%u/",
 		target);
-	if ((written <= 0) || (written >= sizeof(proc_dir_name))) {
+	if ((written <= 0) || ((size_t)written >= sizeof(proc_dir_name))) {
 		fprintf(stderr, "%s: snprintf of proc path failed: %s\n",
 			Prog, strerror(errno));
 	}