diff --git a/configure/os/CONFIG.Common.RTEMS b/configure/os/CONFIG.Common.RTEMS
index d751fbe8e..d22506097 100644
--- a/configure/os/CONFIG.Common.RTEMS
+++ b/configure/os/CONFIG.Common.RTEMS
@@ -53,12 +53,13 @@ VALID_BUILDS = Ioc
 # through the following contortions to get the EPICS flags back.
 CFLAGS = $(CROSS_CFLAGS) $(OPT_CFLAGS) $(DEBUG_CFLAGS)\
  $(WARN_CFLAGS) $(TARGET_CFLAGS) $(USR_CFLAGS) $(ARCH_DEP_CFLAGS)\
- $(CODE_CFLAGS) $(STATIC_CFLAGS)  $(OP_SYS_CFLAGS) $(LIBRARY_SRC_CFLAGS)
+ $(CODE_CFLAGS) $(STATIC_CFLAGS)  $(OP_SYS_CFLAGS) $(LIBRARY_SRC_CFLAGS)\
+ $(HDEPENDS_CFLAGS)
 
 CXXFLAGS = $(CROSS_CXXFLAGS) $(OPT_CXXFLAGS)\
  $(DEBUG_CXXFLAGS) $(WARN_CXXFLAGS) $(TARGET_CXXFLAGS) $(USR_CXXFLAGS)\
  $(ARCH_DEP_CXXFLAGS) $(CODE_CXXFLAGS) $(STATIC_CXXCFLAGS) $(OP_SYS_CXXFLAGS)\
- $(LIBRARY_SRC_CFLAGS)
+ $(LIBRARY_SRC_CFLAGS) $(HDEPENDS_CFLAGS)
 
 LDFLAGS = $(OPT_LDFLAGS) $(TARGET_LDFLAGS) $(USR_LDFLAGS) \
  $(ARCH_DEP_LDFLAGS) $(DEBUG_LDFLAGS) $(OP_SYS_LDFLAGS) $(CROSS_LDFLAGS)\