diff --git a/lib/iolog/iolog_fileio.c b/lib/iolog/iolog_fileio.c
index 84aeaa85b..e8957efaf 100644
--- a/lib/iolog/iolog_fileio.c
+++ b/lib/iolog/iolog_fileio.c
@@ -827,10 +827,10 @@ iolog_eof(struct iolog_file *iol)
 
 #ifdef HAVE_ZLIB_H
     if (iol->compressed)
-	ret = gzeof(iol->fd.g) == 1;
+	ret = gzeof(iol->fd.g) != 0;
     else
 #endif
-	ret = feof(iol->fd.f) == 1;
+	ret = feof(iol->fd.f) != 0;
     debug_return_int(ret);
 }