diff --git a/src/coding.c b/src/coding.c
index 5f3ceab718b..ff7cf56c297 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -5488,7 +5488,7 @@ decode_coding_charset (struct coding_system *coding)
     {
       int c;
       Lisp_Object val;
-      struct charset *charset;
+      struct charset *charset UNINIT;
       int dim;
       int len = 1;
       unsigned code;