diff --git a/kernel/profile.c b/kernel/profile.c
index 1fcf1adcf4eb..e7defa90a34c 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -156,7 +156,7 @@ read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 	unsigned long p = *ppos;
 	ssize_t read;
 	char *pnt;
-	unsigned long sample_step = 1UL << prof_shift;
+	unsigned int sample_step = (unsigned int)(1UL << prof_shift);
 
 	if (p >= (prof_len+1)*sizeof(unsigned int))
 		return 0;