diff --git a/lib/asn1/gen_decode.c b/lib/asn1/gen_decode.c
index a22b90819..266cfc45e 100644
--- a/lib/asn1/gen_decode.c
+++ b/lib/asn1/gen_decode.c
@@ -297,8 +297,9 @@ generate_type_decode (Symbol *s)
     fprintf (codefile,
 	     "size_t ret = 0, reallen;\n"
 	     "size_t l;\n"
-	     "int e, i;\n\n");
-    
+	     "int i, e;\n\n");
+    fprintf(codefile, "i = 0;\n"); /* hack to avoid `unused variable' */
+
     decode_type ("data", s->type);
     fprintf (codefile, 
 	     "if(size) *size = ret;\n"
diff --git a/lib/asn1/gen_encode.c b/lib/asn1/gen_encode.c
index 7dede0185..bedc8f3ea 100644
--- a/lib/asn1/gen_encode.c
+++ b/lib/asn1/gen_encode.c
@@ -240,6 +240,7 @@ generate_type_encode (Symbol *s)
 	     "size_t ret = 0;\n"
 	     "size_t l;\n"
 	     "int i, e;\n\n");
+    fprintf(codefile, "i = 0;\n"); /* hack to avoid `unused variable' */
     
     encode_type ("data", s->type);
     fprintf (codefile, "*size = ret;\n"