diff --git a/libtcc.c b/libtcc.c
index 5d06652b..01abdbc4 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -1039,6 +1039,11 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
         filename = buf;
 #endif
 
+    /* ignore binary files with -E */
+    if (s1->output_type == TCC_OUTPUT_PREPROCESS
+        && (flags & AFF_TYPE_BIN))
+        return 0;
+
     /* open the file */
     fd = _tcc_open(s1, filename);
     if (fd < 0) {
diff --git a/tccpp.c b/tccpp.c
index 8100f887..92a747b8 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -3236,6 +3236,7 @@ static int next_argstream(Sym **nested_list, TokenString *ws_str)
                         } else if (c == '/') {
                             p = parse_line_comment(p) - 1;
                         } else {
+                            *--p = ch;
                             break;
                         }
                         ch = ' ';