diff --git a/components/libc/compilers/common/SConscript b/components/libc/compilers/common/SConscript
index 6c14b4e881..2407301405 100644
--- a/components/libc/compilers/common/SConscript
+++ b/components/libc/compilers/common/SConscript
@@ -9,12 +9,12 @@ CPPPATH = [cwd]
 
 if GetDepend('RT_USING_LIBC'):
         src += Glob('*.c')      
-        if GetDepend('RT_USING_POSIX') == False:
-                SrcRemove(src, ['unistd.c'])
 else:
         if GetDepend('RT_LIBC_USING_TIME') and not GetDepend('RT_USING_MINILIBC'):
                 src += ['time.c']
 
+if GetDepend('RT_USING_POSIX') == False:
+        SrcRemove(src, ['unistd.c'])
 
 if not GetDepend('RT_USING_MINILIBC') and (GetDepend('RT_USING_LIBC') or GetDepend('RT_LIBC_USING_TIME')):
 	group = DefineGroup('libc', src, depend = [''], CPPPATH = CPPPATH)