diff --git a/motorApp/ImsSrc/Makefile b/motorApp/ImsSrc/Makefile
index a8488c6d..48dceb03 100644
--- a/motorApp/ImsSrc/Makefile
+++ b/motorApp/ImsSrc/Makefile
@@ -10,13 +10,11 @@ DBD += devImsMotor.dbd
 LIBRARY_IOC = Ims
 
 # Intelligent Motion Systems driver support.
+SRCS += ImsRegister.cc
 SRCS += devIM483SM.cc drvIM483SM.cc
 SRCS += devIM483PL.cc drvIM483PL.cc
 SRCS += devMDrive.cc  drvMDrive.cc
 
-OBJS_DEFAULT += ImsRegister
-OBJS_vxWorks += -nil-
-
 Ims_LIBS += motor motorCOM_mpf
 Ims_LIBS += $(EPICS_BASE_IOC_LIBS)