diff --git a/system/base/unzip/actions.py b/system/base/unzip/actions.py
index a5300017..4f17c70f 100644
--- a/system/base/unzip/actions.py
+++ b/system/base/unzip/actions.py
@@ -11,7 +11,7 @@ from pisi.actionsapi import shelltools
 
 
 def build():
-
+    pisitools.cflags.add("-std=gnu17")
     shelltools.system('sed -i "/MANDIR =/s#)/#)/share/#" unix/Makefile')
 
     opt='-DACORN_FTYPE_NFS \
@@ -34,4 +34,4 @@ def install():
 
 
     pisitools.doman("man/*.1")
-    pisitools.dodoc("BUGS", "History*", "README", "ToDo", "WHERE" , "LICENSE")
\ No newline at end of file
+    pisitools.dodoc("BUGS", "History*", "README", "ToDo", "WHERE" , "LICENSE")