diff --git a/src/ca/Makefile b/src/ca/Makefile
index 34de39c61..ed840de8e 100644
--- a/src/ca/Makefile
+++ b/src/ca/Makefile
@@ -89,7 +89,7 @@ PROD_LIBS = ca Com
 PROD_SYS_LIBS_WIN32 = ws2_32 advapi32 user32
 
 PROD_HOST += caRepeater catime acctst caConnTest casw caEventRate
-OBJS_IOC += catime acctst caConnTest casw caEventRate
+OBJS_IOC_vxWorks += catime acctst caConnTest casw caEventRate
 caRepeater_SRCS = caRepeater.cpp
 catime_SRCS = catimeMain.c catime.c 
 acctst_SRCS = acctstMain.c acctst.c 
diff --git a/src/db/test/Makefile b/src/db/test/Makefile
index 71a5b82d1..c76ebbe28 100644
--- a/src/db/test/Makefile
+++ b/src/db/test/Makefile
@@ -15,7 +15,7 @@ PROD_LIBS += dbIoc dbStaticHost ca Com
 
 callbackTestHost_SRCS += callbackTestMain.c callbackTest.c
 PROD_HOST += callbackTestHost
-OBJS_IOC += callbackTest
+OBJS_IOC_vxWorks += callbackTest
 
 include $(TOP)/configure/RULES
 
diff --git a/src/util/Makefile b/src/util/Makefile
index a7977f641..409334e4d 100644
--- a/src/util/Makefile
+++ b/src/util/Makefile
@@ -26,7 +26,7 @@ ca_test_SRCS = ca_test_main.c ca_test.c
 iocLogServer_SRCS = iocLogServer.c
 startCArepeater_SRCS = startCArepeater.c
 
-OBJS = ca_test
+OBJS_vxWorks = ca_test
 
 SCRIPTS_solaris := S99logServer S99caRepeater