diff --git a/klib/src/platform/linux/linux.def b/klib/src/platform/linux/linux.def
index 3a27036cbf0..5470df67eb3 100644
--- a/klib/src/platform/linux/linux.def
+++ b/klib/src/platform/linux/linux.def
@@ -33,5 +33,5 @@ headers = aio.h aliases.h a.out.h argp.h argz.h byteswap.h cpio.h crypt.h \
 	sys/ustat.h utime.h sys/utsname.h sys/vfs.h sys/vlimit.h \
 	sys/vt.h sys/vtimes.h sys/xattr.h
 
-compilerOpts = -D_GNU_SOURCE
-#depends = posix
\ No newline at end of file
+compilerOpts = -D_ANSI_SOURCE -D_POSIX_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700
+depends = posix
diff --git a/klib/src/platform/linux/posix.def b/klib/src/platform/linux/posix.def
index ff1bd066b93..62f757664c8 100644
--- a/klib/src/platform/linux/posix.def
+++ b/klib/src/platform/linux/posix.def
@@ -12,7 +12,7 @@ headers = alloca.h ar.h assert.h complex.h dirent.h dlfcn.h err.h errno.h fcntl.
     sys/queue.h sys/select.h sys/shm.h sys/stat.h sys/socket.h \
     sys/time.h sys/times.h sys/utsname.h sys/wait.h
 
-compilerOpts = -D_ANSI_SOURCE -D_POSIX_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700
+compilerOpts = -D_ANSI_SOURCE -D_POSIX_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D__need_error_t
 
 ---
 // cinterop -target linux -def klib/src/platform/linux/posix.def -o platform.posix.klib