diff --git a/src/bin/pg_dump/compress_io.c b/src/bin/pg_dump/compress_io.c
index fb280ab..a00bb54 100644
*** a/src/bin/pg_dump/compress_io.c
--- b/src/bin/pg_dump/compress_io.c
*************** cfwrite(const void *ptr, int size, cfp *
*** 594,600 ****
  {
  #ifdef HAVE_LIBZ
  	if (fp->compressedfp)
! 		return gzwrite(fp->compressedfp, ptr, size);
  	else
  #endif
  		return fwrite(ptr, 1, size, fp->uncompressedfp);
--- 594,600 ----
  {
  #ifdef HAVE_LIBZ
  	if (fp->compressedfp)
! 		return gzwrite(fp->compressedfp, (void *)ptr, size);
  	else
  #endif
  		return fwrite(ptr, 1, size, fp->uncompressedfp);