diff --git a/gcc/config/gcn/mkoffload.cc b/gcc/config/gcn/mkoffload.cc
index 9db2124b129..94ba7ffa5af 100644
--- a/gcc/config/gcn/mkoffload.cc
+++ b/gcc/config/gcn/mkoffload.cc
@@ -723,7 +723,7 @@ process_obj (FILE *in, FILE *cfile)
 	   "  unsigned global_variable_count;\n"
 	   "} target_data = {\n"
 	   "  &gcn_image,\n"
-	   "  ARRAY_SIZE (gcn_kernels),\n"
+	   "  sizeof (gcn_kernels) / sizeof (gcn_kernels[0]),\n"
 	   "  gcn_kernels,\n"
 	   "  gcn_num_vars\n"
 	   "};\n\n");
diff --git a/gcc/config/nvptx/mkoffload.cc b/gcc/config/nvptx/mkoffload.cc
index fa3b4b76821..b28c1a32292 100644
--- a/gcc/config/nvptx/mkoffload.cc
+++ b/gcc/config/nvptx/mkoffload.cc
@@ -316,11 +316,11 @@ process (FILE *in, FILE *out)
 	   "  const struct nvptx_fn *fn_names;\n"
 	   "  unsigned fn_num;\n"
 	   "} target_data = {\n"
-	   "  ptx_objs, ARRAY_SIZE (ptx_objs),\n"
+	   "  ptx_objs, sizeof (ptx_objs) / sizeof (ptx_objs[0]),\n"
 	   "  var_mappings,"
-	   "  ARRAY_SIZE (var_mappings),\n"
+	   "  sizeof (var_mappings) / sizeof (var_mappings[0]),\n"
 	   "  func_mappings,"
-	   "  ARRAY_SIZE (func_mappings)\n"
+	   "  sizeof (func_mappings) / sizeof (func_mappings[0])\n"
 	   "};\n\n");
 
   fprintf (out, "#ifdef __cplusplus\n"