diff --git a/klib/src/platform/linux/linux.def b/klib/src/platform/linux/linux.def
index 86ec964575e..8830a3f8211 100644
--- a/klib/src/platform/linux/linux.def
+++ b/klib/src/platform/linux/linux.def
@@ -34,3 +34,4 @@ headers = aio.h aliases.h a.out.h argp.h argz.h byteswap.h cpio.h crypt.h \
 	sys/vt.h sys/vtimes.h sys/xattr.h
 
 compilerOpts = -D_GNU_SOURCE
+depends = posix
\ No newline at end of file
diff --git a/klib/src/platform/linux/zlib.def b/klib/src/platform/linux/zlib.def
index 46ed691d1a3..f30d62ea21b 100644
--- a/klib/src/platform/linux/zlib.def
+++ b/klib/src/platform/linux/zlib.def
@@ -1,3 +1,4 @@
 package = platform.zlib
 headers = zconf.h zlib.h
 linkerOpts = -lz
+depends = posix
\ No newline at end of file