diff --git a/clients/net-snk/kernel/systemcall.c b/clients/net-snk/kernel/systemcall.c
index 52c45ca..01d5f2b 100644
--- a/clients/net-snk/kernel/systemcall.c
+++ b/clients/net-snk/kernel/systemcall.c
@@ -120,7 +120,7 @@ ssize_t write (int fd, const void *buf, size_t len)
 	char dest_buf[512];
 	char *dest_buf_ptr;
 	const char *dbuf = buf;
-	int i;
+	size_t i;
 
 	if (fd == 1 || fd == 2) {
 		dest_buf_ptr = &dest_buf[0];
diff --git a/clients/net-snk/oflib/of.c b/clients/net-snk/oflib/of.c
index 5c502ac..365191c 100644
--- a/clients/net-snk/oflib/of.c
+++ b/clients/net-snk/oflib/of.c
@@ -481,7 +481,7 @@ map_one_range(uint64_t *addr, int type, uint32_t *ranges, uint32_t nac,
 	uint64_t cm, size, pm;
 	/* only check for the type if nac == 3 (PCI) */
 	DEBUG_TR("type %x, nac %x\n", ranges[0], nac);
-	if (((ranges[0] & 0x03000000) >> 24) != type && nac == 3)
+	if ((((int)ranges[0] & 0x03000000) >> 24) != type && nac == 3)
 		return -1;
 	/* okay, it is the same type let's see if we find a mapping */
 	size = get_dt_address(ranges + nac + pnac, nsc);
diff --git a/lib/libnvram/nvram.c b/lib/libnvram/nvram.c
index 6d145d7..048c583 100644
--- a/lib/libnvram/nvram.c
+++ b/lib/libnvram/nvram.c
@@ -269,7 +269,7 @@ static uint8_t calc_partition_header_checksum(int offset)
 	return checksum;
 }
 
-static int calc_used_nvram_space(void)
+static unsigned int calc_used_nvram_space(void)
 {
 	unsigned walk, len;
 
diff --git a/rtas/flash/block_lists.c b/rtas/flash/block_lists.c
index e632fd0..d632229 100644
--- a/rtas/flash/block_lists.c
+++ b/rtas/flash/block_lists.c
@@ -41,6 +41,7 @@ print_progress(void)
 		break;
 	case 0:
 		printf("\b\\");
+		/* fallthrough */
 	default:
 		i = 3;
 	}