diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index d69ae6a..4826e9f 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -19,7 +19,7 @@
 
 static struct spi_flash *flash;
 
-static int do_spi_flash_probe(int argc, char *argv[])
+static int do_spi_flash_probe(int argc, char * const argv[])
 {
 	unsigned int bus = 0;
 	unsigned int cs;
@@ -75,7 +75,7 @@
 	return 1;
 }
 
-static int do_spi_flash_read_write(int argc, char *argv[])
+static int do_spi_flash_read_write(int argc, char * const argv[])
 {
 	unsigned long addr;
 	unsigned long offset;
@@ -122,7 +122,7 @@
 	return 1;
 }
 
-static int do_spi_flash_erase(int argc, char *argv[])
+static int do_spi_flash_erase(int argc, char * const argv[])
 {
 	unsigned long offset;
 	unsigned long len;
@@ -152,7 +152,7 @@
 	return 1;
 }
 
-static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	const char *cmd;