diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index b548dea4e5b95e30c01f369f0c95dcd06db67551..116ac5f53dced70d0098178e57b7e09207d90603 100644
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -85,7 +85,7 @@ int __init e820_mapped(unsigned long start, unsigned long end, unsigned type)
 		struct e820entry *ei = &e820.map[i]; 
 		if (type && ei->type != type) 
 			continue;
-		if (ei->addr >= end || ei->addr + ei->size < start) 
+		if (ei->addr >= end || ei->addr + ei->size <= start)
 			continue; 
 		return 1; 
 	}