diff --git a/include/arch/win32/apr_arch_misc.h b/include/arch/win32/apr_arch_misc.h
index 7a0b95caed4..15312adf4ef 100644
--- a/include/arch/win32/apr_arch_misc.h
+++ b/include/arch/win32/apr_arch_misc.h
@@ -498,7 +498,7 @@ APR_DECLARE_LATE_DLL_FUNC(DLL_IPHLPAPI, NET_IFINDEX, WINAPI, if_nametoindex, 0,
 #undef if_indextoname
 #endif
 APR_DECLARE_LATE_DLL_FUNC(DLL_IPHLPAPI, PCHAR, NETIOAPI_API_, if_indextoname, 0, (
-    NET_IFINDEX InterfaceIndex
+    NET_IFINDEX InterfaceIndex,
     PCHAR       InterfaceName),
     (InterfaceIndex, InterfaceName));
 #define if_indextoname apr_winapi_if_indextoname
diff --git a/network_io/unix/sockaddr.c b/network_io/unix/sockaddr.c
index a622c490db3..581177997cb 100644
--- a/network_io/unix/sockaddr.c
+++ b/network_io/unix/sockaddr.c
@@ -30,7 +30,7 @@
 #endif
 
 #if defined(HAVE_IF_INDEXTONAME) && defined(_MSC_VER)
-#include <Iphlpapi.h>
+#include "arch/win32/apr_arch_misc.h"
 #endif
 
 #define APR_WANT_STRFUNC
@@ -1252,7 +1252,7 @@ APR_DECLARE(apr_status_t) apr_sockaddr_zone_set(apr_sockaddr_t *sa,
             return APR_EGENERAL;
         }
 
-        sa->sa.sin6.sin6_scope_id = i;
+        sa->sa.sin6.sin6_scope_id = (unsigned int) i;
         return APR_SUCCESS;
     }
 #endif