diff --git a/firmware/target/arm/imx233/sd-imx233.c b/firmware/target/arm/imx233/sd-imx233.c
index 8928faf3f9..03b3684f7d 100644
--- a/firmware/target/arm/imx233/sd-imx233.c
+++ b/firmware/target/arm/imx233/sd-imx233.c
@@ -414,7 +414,6 @@ int sd_init(void)
 
 static int transfer_sectors(IF_MD2(int drive,) unsigned long start, int count, void *buf, bool read)
 {
-    IF_MD((void) drive);
     int ret = 0;
     uint32_t resp;
 
diff --git a/utils/imxtools/misc.c b/utils/imxtools/misc.c
index a7cc096059..fce71ae0cd 100644
--- a/utils/imxtools/misc.c
+++ b/utils/imxtools/misc.c
@@ -39,7 +39,7 @@ void *memdup(const void *p, size_t len)
 
 void generate_random_data(void *buf, size_t sz)
 {
-    int i = 0;
+    size_t i = 0;
     unsigned char* p = (unsigned char*)buf;
     while(i++ < sz)
         *p++ = rand();