diff --git a/libtransmission/json.h b/libtransmission/json.h
index 44eca8ebd..517c77be1 100644
--- a/libtransmission/json.h
+++ b/libtransmission/json.h
@@ -12,9 +12,17 @@
 
 #ifndef TR_JSON_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int tr_jsonParse( const void *     vbuf,
                   size_t           len,
                   struct tr_benc * setme_benc,
                   const uint8_t ** setme_end );
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif