diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index de05775..b6772d6 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -80,7 +80,7 @@
 }
 #endif
 
-#ifndef CONFIG_PROMISC_DEVMEM
+#ifdef CONFIG_STRICT_DEVMEM
 static inline int range_is_allowed(unsigned long pfn, unsigned long size)
 {
 	u64 from = ((u64)pfn) << PAGE_SHIFT;