diff --git a/src/vxWorks/iocCore/Makefile b/src/vxWorks/iocCore/Makefile
index a1e2ed721..aad6ed11d 100644
--- a/src/vxWorks/iocCore/Makefile
+++ b/src/vxWorks/iocCore/Makefile
@@ -14,7 +14,7 @@ iocCore_OBJS += $(INSTALL_BIN)/rsrvIocLibrary.o
 iocCore_OBJS += $(INSTALL_BIN)/vxComLibrary.o
 iocCore_OBJS += $(INSTALL_BIN)/vxDbLibrary.o
 iocCore_OBJS += $(INSTALL_BIN)/iocshLibrary.o
-iocCore_SRCS += registerRecordDeviceDriver.c
+iocCore_OBJS += registerRecordDeviceDriver.o
 
 OBJLIB_vxWorks = iocCore
 OBJLIB_OBJS += $(iocCore_OBJS)