diff --git a/libmaxsi/fseeko.cpp b/libmaxsi/fseeko.cpp
index 8341c583..b4de1757 100644
--- a/libmaxsi/fseeko.cpp
+++ b/libmaxsi/fseeko.cpp
@@ -27,5 +27,6 @@
 extern "C" int fseeko(FILE* fp, off_t offset, int whence)
 {
 	fp->numpushedback = 0;
+	fflush(fp);
 	return (fp->seek_func) ? fp->seek_func(fp->user, offset, whence) : 0;
 }