diff --git a/pimd/test_igmpv3_join.c b/pimd/test_igmpv3_join.c
index fe64fbc..81026ae 100644
--- a/pimd/test_igmpv3_join.c
+++ b/pimd/test_igmpv3_join.c
@@ -37,7 +37,7 @@
 static int iface_solve_index(const char *ifname)
 {
   struct if_nameindex *ini;
-  int ifindex = -1;
+  ifindex_t ifindex = -1;
   int i;
 
   if (!ifname)
@@ -77,7 +77,7 @@
   const char *ifname;
   const char *group;
   const char *source;
-  int ifindex;
+  ifindex_t ifindex;
   int result;
   int fd;