diff --git a/src/device/pci_rom.c b/src/device/pci_rom.c
index 1bdccf0474..dbc05ac790 100644
--- a/src/device/pci_rom.c
+++ b/src/device/pci_rom.c
@@ -29,6 +29,9 @@
 #include <string.h>
 #include <cbfs.h>
 
+/* Rmodules don't like weak symbols. */
+u32 __attribute__((weak)) map_oprom_vendev(u32 vendev) { return vendev; }
+
 struct rom_header *pci_rom_probe(struct device *dev)
 {
 	struct rom_header *rom_header;
@@ -41,8 +44,7 @@ struct rom_header *pci_rom_probe(struct device *dev)
 	u32 vendev = (dev->vendor << 16) | dev->device;
 	u32 mapped_vendev = vendev;
 
-	if (map_oprom_vendev)
-		mapped_vendev = map_oprom_vendev(vendev);
+	mapped_vendev = map_oprom_vendev(vendev);
 
 	if (!rom_header) {
 		if (vendev != mapped_vendev) {
diff --git a/src/include/device/pci_rom.h b/src/include/device/pci_rom.h
index fe77276491..a929206318 100644
--- a/src/include/device/pci_rom.h
+++ b/src/include/device/pci_rom.h
@@ -35,6 +35,6 @@ struct  pci_data {
 
 struct rom_header *pci_rom_probe(struct device *dev);
 struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header);
-u32 __attribute__((weak)) map_oprom_vendev(u32 vendev);
+u32 map_oprom_vendev(u32 vendev);
 
 #endif