1 files changed, 6 insertions, 0 deletions
diff --git a/io.c b/io.c
index fc50ba8696..63ed511151 100644
--- a/io.c
+++ b/io.c
@@ -141,12 +141,18 @@ static VALUE lineno;
 extern int ReadDataPending();
 #  define READ_DATA_PENDING(fp) (!feof(fp))
 #endif
+
 #ifndef READ_DATA_PENDING_PTR
 # ifdef FILE_READPTR
 #  define READ_DATA_PENDING_PTR(fp) ((fp)->FILE_READPTR)
 # endif
 #endif
 
+#if defined __DJGPP__
+# undef READ_DATA_PENDING_COUNT
+# undef READ_DATA_PENDING_PTR
+#endif
+
 #define READ_CHECK(fp) do {\
     if (!READ_DATA_PENDING(fp)) {\
 	rb_thread_wait_fd(fileno(fp));\