diff --git a/arch/powerpc/include/asm/abs_addr.h b/arch/powerpc/include/asm/abs_addr.h
index 98324c5a82867cfa5ace5179de635220ab5d01a4..c3bffc3fa1deddd6c5898d6905c127bd2c0d4a7b 100644
--- a/arch/powerpc/include/asm/abs_addr.h
+++ b/arch/powerpc/include/asm/abs_addr.h
@@ -69,7 +69,7 @@ static inline unsigned long phys_to_abs(unsigned long pa)
  * Legacy iSeries Hypervisor calls
  */
 #define iseries_hv_addr(virtaddr)	\
-	(0x8000000000000000 | virt_to_abs(virtaddr))
+	(0x8000000000000000UL | virt_to_abs(virtaddr))
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_ABS_ADDR_H */