diff --git a/os_dep/linux/rtw_proc.c b/os_dep/linux/rtw_proc.c
index 1507969..853f880 100644
--- a/os_dep/linux/rtw_proc.c
+++ b/os_dep/linux/rtw_proc.c
@@ -6094,6 +6094,7 @@ static ssize_t proc_set_single_tone(struct file *file, const char __user *buffer
 	
 	char tmp[32];
 	u32 en, rf_path;
+	int num;  // Move declaration to the top
 
 	if (!padapter)
 		return -EFAULT;
@@ -6109,7 +6110,7 @@ static ssize_t proc_set_single_tone(struct file *file, const char __user *buffer
 	}
 
 	if (buffer && !copy_from_user(tmp, buffer, count)) {
-		int num = sscanf(tmp, "%u %u", &en, &rf_path);
+		num = sscanf(tmp, "%u %u", &en, &rf_path);  // Now, `num` is already declared
 		if (num < 1)
 			return count;
 	}