diff --git a/lang/cem/libcc/stdio/fdopen.c b/lang/cem/libcc/stdio/fdopen.c
index b8c5f124c..338dba3d2 100644
--- a/lang/cem/libcc/stdio/fdopen.c
+++ b/lang/cem/libcc/stdio/fdopen.c
@@ -34,6 +34,7 @@ char *mode;
 	fp->_count = 0;
 	fp->_fd = fd;
 	fp->_flags = flags;
+	fp->_buf = 0;
 	_io_table[i] = fp;
 	return(fp);
 }
diff --git a/lang/cem/libcc/stdio/fopen.c b/lang/cem/libcc/stdio/fopen.c
index 5ab62ffa2..fd140f4bf 100644
--- a/lang/cem/libcc/stdio/fopen.c
+++ b/lang/cem/libcc/stdio/fopen.c
@@ -52,6 +52,7 @@ char *name , *mode;
 	fp->_count = 0;
 	fp->_fd = fd;
 	fp->_flags = flags;
+	fp->_buf = 0;
 	_io_table[i] = fp;
 	return(fp);
 }