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--- a/src/rcldb/rcldb.cpp
+++ b/src/rcldb/rcldb.cpp
@@ -1684,7 +1684,7 @@
 #endif
 
 // Flush when idxflushmbs is reached
-bool Db::maybeflush(off_t moretext)
+bool Db::maybeflush(int64_t moretext)
 {
     if (m_flushMb > 0) {
 	m_curtxtsz += moretext;