diff --git a/src/main.h b/src/main.h
index 7ae8eec4df0..de38f79b64f 100644
--- a/src/main.h
+++ b/src/main.h
@@ -111,7 +111,7 @@ static const unsigned int DEFAULT_BANSCORE_THRESHOLD = 100;
 
 static const bool DEFAULT_TESTSAFEMODE = false;
 /** Default for -mempoolreplacement */
-static const bool DEFAULT_ENABLE_REPLACEMENT = true;
+static const bool DEFAULT_ENABLE_REPLACEMENT = false;
 
 /** Maximum number of headers to announce when relaying blocks with headers message.*/
 static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8;