diff --git a/fs/jffs2/compr_zlib.c b/fs/jffs2/compr_zlib.c
index 87ff964f5f6dc36a2db068f5456fe131e0620444..4cc4e090c9b059a275dc14da33e03803d37790e7 100644
--- a/fs/jffs2/compr_zlib.c
+++ b/fs/jffs2/compr_zlib.c
@@ -171,6 +171,8 @@ int __init jffs2_zlib_init(void)
     ret = alloc_workspaces();
     if (ret)
 	    return ret;
+    pthread_mutex_init(&deflate_mutex, NULL);
+    pthread_mutex_init(&inflate_mutex, NULL);
 
     ret = jffs2_register_compressor(&jffs2_zlib_comp);
     if (ret)
@@ -181,6 +183,8 @@ int __init jffs2_zlib_init(void)
 
 void jffs2_zlib_exit(void)
 {
+    pthread_mutex_destroy(&deflate_mutex);
+    pthread_mutex_destroy(&inflate_mutex);
     jffs2_unregister_compressor(&jffs2_zlib_comp);
     free_workspaces();
 }