diff --git a/src/vrend_decode.c b/src/vrend_decode.c
index 409cec7..ede7280 100644
--- a/src/vrend_decode.c
+++ b/src/vrend_decode.c
@@ -1045,6 +1045,10 @@ void vrend_renderer_context_create_internal(uint32_t handle, uint32_t nlen,
    if (handle >= VREND_MAX_CTX)
       return;
 
+   dctx = dec_ctx[handle];
+   if (dctx)
+      return;
+
    dctx = malloc(sizeof(struct vrend_decode_ctx));
    if (!dctx)
       return;