diff --git a/hs20/server/spp_server.c b/hs20/server/spp_server.c
index 4bef0ff..a50e907 100644
--- a/hs20/server/spp_server.c
+++ b/hs20/server/spp_server.c
@@ -633,7 +633,7 @@
 
 	add_text_node(ctx, node, "Username", user);
 
-	b64 = (char *) base64_encode((unsigned char *) pw, strlen(pw), NULL);
+	b64 = base64_encode(pw, strlen(pw), NULL);
 	if (b64 == NULL)
 		return NULL;
 	len = os_strlen(b64);
@@ -1602,8 +1602,7 @@
 
 	xml_node_create_text(ctx->xml, enroll, ns, "estUserID", user);
 
-	b64 = (char *) base64_encode((unsigned char *) password,
-				     strlen(password), NULL);
+	b64 = base64_encode(password, strlen(password), NULL);
 	if (b64 == NULL) {
 		xml_node_free(ctx->xml, spp_node);
 		return NULL;