1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index aba4dc22cd..536b8b2933 100644
--- a/io.c
+++ b/io.c
@@ -144,7 +144,7 @@ extern int ReadDataPending();
 
 #ifndef READ_DATA_PENDING_PTR
 # ifdef FILE_READPTR
-#  define READ_DATA_PENDING_PTR(fp) ((fp)->FILE_READPTR)
+#  define READ_DATA_PENDING_PTR(fp) ((char *)(fp)->FILE_READPTR)
 # endif
 #endif