diff --git a/configure/os/CONFIG.Common.RTEMS b/configure/os/CONFIG.Common.RTEMS
index 55ce278aa..77fe32c7d 100644
--- a/configure/os/CONFIG.Common.RTEMS
+++ b/configure/os/CONFIG.Common.RTEMS
@@ -60,7 +60,7 @@ LDFLAGS = $(OPT_LDFLAGS) $(TARGET_LDFLAGS) $(USR_LDFLAGS) $(PROD_LDFLAGS)\
 LDLIBS = $(PROD_LDLIBS) $(STATIC_LDLIBS)\
  $(POSIX_LDLIBS) $(ARCH_DEP_LDLIBS) $(OP_SYS_LDLIBS)
 
-CPPFLAGS += $(CROSS_CPPFLAGS) $(POSIX_CPPFLAGS) $(EPICS_BASE_CPPFLAGS)\
+CPPFLAGS += $(CROSS_CPPFLAGS) $(POSIX_CPPFLAGS) $(BASE_CPPFLAGS)\
  $(TARGET_CPPFLAGS) $(USR_CPPFLAGS) $(ARCH_DEP_CPPFLAGS)\
  $(OP_SYS_CPPFLAGS) $(CODE_CPPFLAGS)