diff --git a/source/shell/flash.c b/source/shell/flash.c
index 410a49a..6211ad1 100644
--- a/source/shell/flash.c
+++ b/source/shell/flash.c
@@ -127,17 +127,17 @@ static int do_flash_read(struct console *con, size_t argc, const char **argv)
 		return -1;
 	}
 
-	addr = strtoull(argv[0], NULL, 16);
+	addr = strtoull(argv[0], NULL, 0);
 
 	if (errno == EINVAL || errno == ERANGE) {
-		fprintf(con->fp, "error: expected hexadecimal value for addr\n");
+		fprintf(con->fp, "error: expected integer value for addr\n");
 		return -1;
 	}
 
-	len = strtoull(argv[1], NULL, 16);
+	len = strtoull(argv[1], NULL, 0);
 
 	if (errno == EINVAL || errno == ERANGE) {
-		fprintf(con->fp, "error: expected hexadecimal value for len\n");
+		fprintf(con->fp, "error: expected integer value for len\n");
 		return -1;
 	}
 
@@ -171,17 +171,17 @@ static int do_flash_write(struct console *con, size_t argc, const char **argv)
 		return -1;
 	}
 
-	addr = strtoull(argv[0], NULL, 16);
+	addr = strtoull(argv[0], NULL, 0);
 
 	if (errno == EINVAL || errno == ERANGE) {
-		fprintf(con->fp, "error: expected hexadecimal value for addr\n");
+		fprintf(con->fp, "error: expected integer value for addr\n");
 		return -1;
 	}
 
-	len = strtoull(argv[1], NULL, 16);
+	len = strtoull(argv[1], NULL, 0);
 
 	if (errno == EINVAL || errno == ERANGE) {
-		fprintf(con->fp, "error: expected hexadecimal value for len\n");
+		fprintf(con->fp, "error: expected integer value for len\n");
 		return -1;
 	}
 
@@ -219,17 +219,17 @@ static int do_flash_erase(struct console *con, size_t argc, const char **argv)
 		return -1;
 	}
 
-	addr = strtoull(argv[0], NULL, 16);
+	addr = strtoull(argv[0], NULL, 0);
 
 	if (errno == EINVAL || errno == ERANGE) {
-		fprintf(con->fp, "error: expected hexadecimal value for addr\n");
+		fprintf(con->fp, "error: expected integer value for addr\n");
 		return -1;
 	}
 
-	len = strtoull(argv[1], NULL, 16);
+	len = strtoull(argv[1], NULL, 0);
 
 	if (errno == EINVAL || errno == ERANGE) {
-		fprintf(con->fp, "error: expected hexadecimal value for len\n");
+		fprintf(con->fp, "error: expected integer value for len\n");
 		return -1;
 	}