diff --git a/hwaccess.c b/hwaccess.c
index c18a110..e1195de 100644
--- a/hwaccess.c
+++ b/hwaccess.c
@@ -97,7 +97,7 @@
 	 * Such reordering and/or merging would break device accesses which
 	 * depend on the exact access order.
 	 */
-	asm("eieio" : : : "memory");
+	___asm___ volatile ("eieio" : : : "memory");
 }
 
 /* PCI port I/O is not yet implemented on PowerPC. */