diff --git a/drivers/char/random/src/random_hw.c b/drivers/char/random/src/random_hw.c
index ffaa495a0bb52dfb7bef1977638e3cf81a67e1de..a290a5864573532a58fc3919bb26e10f415ba54f 100644
--- a/drivers/char/random/src/random_hw.c
+++ b/drivers/char/random/src/random_hw.c
@@ -65,7 +65,7 @@ static int RandomHwClose(struct file *filep)
 
 static int RandomHwIoctl(struct file *filep, int cmd, unsigned long arg)
 {
-    int ret;
+    int ret = -1;
 
     switch (cmd) {
         default:
@@ -77,7 +77,7 @@ static int RandomHwIoctl(struct file *filep, int cmd, unsigned long arg)
 
 static ssize_t RandomHwRead(struct file *filep, char *buffer, size_t buflen)
 {
-    int ret;
+    int ret = -1;
 
     if (g_randomOp.read != NULL) {
         ret = g_randomOp.read(buffer, buflen);