diff --git a/libs/pproc/src/pproc_directive.c b/libs/pproc/src/pproc_directive.c
index 5387920..550bfda 100644
--- a/libs/pproc/src/pproc_directive.c
+++ b/libs/pproc/src/pproc_directive.c
@@ -55,10 +55,10 @@ void scc_pproc_parse_macro_arguments(scc_lexer_tok_ring_t *ring,
     int ok;
     do {
         scc_ring_next_consume(*ring, tok, ok);
+        // ok = scc_lexer_next_non_blank(ring, &tok);
         if (!ok) {
             return;
         }
-        // scc_lexer_next_non_blank(ring, &tok);
         if (tok.type == SCC_TOK_R_PAREN) {
             depth--;
         }
diff --git a/libs/pproc/src/pproc_expand.c b/libs/pproc/src/pproc_expand.c
index eb5b4e7..5c7f5f4 100644
--- a/libs/pproc/src/pproc_expand.c
+++ b/libs/pproc/src/pproc_expand.c
@@ -109,7 +109,7 @@ void scc_pproc_expand_by_src(scc_pproc_macro_table_t *macro_table,
         scc_pproc_parse_macro_arguments(input, &expaned_buffer, true);
     }
     while (1) {
-        scc_ring_peek(*input, tok, ok);
+        ok = scc_lexer_peek_non_blank(input, &tok);
         if (ok == false) {
             break;
         }
@@ -288,7 +288,7 @@ static void rescan(scc_pproc_expand_t *expand_ctx,
 
     int ok = false;
     scc_lexer_tok_t tok;
-    scc_ring_peek(*expand_ctx->input, tok, ok);
+    ok = scc_lexer_peek_non_blank(expand_ctx->input, &tok);
     if (ok && tok.type == SCC_TOK_L_PAREN) {
         scc_lexer_tok_vec_t expaned_buffer;
         scc_vec_init(expaned_buffer);
diff --git a/libs/pproc/tests/test_pproc_unit.c b/libs/pproc/tests/test_pproc_unit.c
index d505fdd..4750f40 100644
--- a/libs/pproc/tests/test_pproc_unit.c
+++ b/libs/pproc/tests/test_pproc_unit.c
@@ -568,7 +568,7 @@ static void test_c99_docs(void) {
                           "\t\t\tt(10,,), t(,11,), t(,,12), t(,,) };\n",
 
                           "int j[] = { 123, 45, 67, 89,\n"
-                          "\t\t\t10, 11, 12,  };\n");
+                          "\t\t\t10, 11, 12, };\n");
 
     TEST_CASE("EXAMPLE 6 To demonstrate the redefinition rules, the following "
               "sequence is valid.");