diff --git a/reactos/ntoskrnl/ex/i386/fastinterlck_asm.S b/reactos/ntoskrnl/ex/i386/fastinterlck_asm.S
index 3bfc090da21..e1625eaa55d 100644
--- a/reactos/ntoskrnl/ex/i386/fastinterlck_asm.S
+++ b/reactos/ntoskrnl/ex/i386/fastinterlck_asm.S
@@ -611,7 +611,7 @@
 @ExfInterlockedCompareExchange64@12:
 
     /* Save registers */
-    push ebp
+    push ebx
     push ebp
 
     /* Get desination pointer, exchange value and comperand value/address */