diff --git a/configure/os/CONFIG.Common.RTEMS b/configure/os/CONFIG.Common.RTEMS
index 964e05ab4..1370264ca 100644
--- a/configure/os/CONFIG.Common.RTEMS
+++ b/configure/os/CONFIG.Common.RTEMS
@@ -75,8 +75,8 @@ OS_CLASS = RTEMS
 
 #--------------------------------------------------
 # Operating system flags
-OP_SYS_CPPFLAGS = -Dfopen=rtems_fopen -Dmain=rtems_main
-OP_SYS_LDLIBS = -lrtemsCom -lreadline -lcurses -lm
+OP_SYS_CPPFLAGS = -Dmain=rtems_main
+OP_SYS_LDLIBS = -lrtemsall -lrtemsCom -lreadline -lcurses -lm
 OP_SYS_LDFLAGS = $(CPU_CFLAGS) -u Init \
                  $(PROJECT_RELEASE)/lib/no-dpmem.rel \
                  $(PROJECT_RELEASE)/lib/no-mp.rel \