diff --git a/mingw-w64-tools/genidl/src/genidl_dumpidl.c b/mingw-w64-tools/genidl/src/genidl_dumpidl.c
index 4c6848a..eb62f39 100644
--- a/mingw-w64-tools/genidl/src/genidl_dumpidl.c
+++ b/mingw-w64-tools/genidl/src/genidl_dumpidl.c
@@ -540,7 +540,7 @@
   if (!behdr)
   {
     /*
-    fprintf (fp, "/* Typedef definitions of basic types.  */\n"
+    fprintf (fp, "/ * Typedef definitions of basic types.  * /\n"
       "typedef unsigned short USHORT;\n"
       "typedef signed short SHORT;\n"
       "typedef unsigned char UCHAR;\n"