diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 59f17ac..f02c34d 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -3388,7 +3388,7 @@
 }
 
 #else
-static inline int init_iommu_pm_ops(void) { }
+static inline void init_iommu_pm_ops(void) {}
 #endif	/* CONFIG_PM */
 
 /*