diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 2496cb2c5551..46d48a0b6dec 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -122,10 +122,10 @@ static unsigned long f_extend(unsigned long address)
 #ifdef CONFIG_64BIT
 	if(unlikely(parisc_narrow_firmware)) {
 		if((address & 0xff000000) == 0xf0000000)
-			return 0xf0f0f0f000000000UL | (u32)address;
+			return (0xfffffff0UL << 32) | (u32)address;
 
 		if((address & 0xf0000000) == 0xf0000000)
-			return 0xffffffff00000000UL | (u32)address;
+			return (0xffffffffUL << 32) | (u32)address;
 	}
 #endif
 	return address;