diff --git a/Python/pystate.c b/Python/pystate.c
index 922e9a3..65219eb 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -79,6 +79,7 @@
         interp->codec_search_cache = NULL;
         interp->codec_error_registry = NULL;
         interp->codecs_initialized = 0;
+        interp->fscodec_initialized = 0;
 #ifdef HAVE_DLOPEN
 #ifdef RTLD_NOW
         interp->dlopenflags = RTLD_NOW;