diff --git a/src/c/unixsys.d b/src/c/unixsys.d
index 09f42bddb..d2ae125f6 100644
--- a/src/c/unixsys.d
+++ b/src/c/unixsys.d
@@ -313,7 +313,7 @@ ecl_waitpid(cl_object pid, cl_object wait)
         int ret;
 #if defined(ECL_MS_WINDOWS_HOST)
         HANDLE *ph = (HANDLE*)ecl_foreign_data_pointer_safe(pid);
-        ret = TerminateProcess(ph, -1);
+        ret = TerminateProcess(*ph, -1);
         error_encountered = (ret == 0);
 #else
         ret = kill(ecl_fixnum(pid), Null(force) ? SIGTERM : SIGKILL);