diff --git a/include/linux/pci.h b/include/linux/pci.h
index 3c95efd..7c34c39 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1154,13 +1154,13 @@
 
 
 #ifndef CONFIG_PCI_MSI
-static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
+static inline int pci_enable_msi_block(struct pci_dev *dev, int nvec)
 {
 	return -ENOSYS;
 }
 
 static inline int
-pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec)
+pci_enable_msi_block_auto(struct pci_dev *dev, int *maxvec)
 {
 	return -ENOSYS;
 }
@@ -1195,8 +1195,8 @@
 	return 0;
 }
 #else
-int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
-int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec);
+int pci_enable_msi_block(struct pci_dev *dev, int nvec);
+int pci_enable_msi_block_auto(struct pci_dev *dev, int *maxvec);
 void pci_msi_shutdown(struct pci_dev *dev);
 void pci_disable_msi(struct pci_dev *dev);
 int pci_msix_table_size(struct pci_dev *dev);