diff --git a/src/read.cpp b/src/read.cpp
index 05a1bd1..b0f8884 100644
--- a/src/read.cpp
+++ b/src/read.cpp
@@ -180,6 +180,7 @@ bool Read::fixMGI() {
 	int len = mName->length();
 	if((*mName)[len-1]=='1' || (*mName)[len-1]=='2') {
 		if((*mName)[len-2] == '/') {
+			delete mName;
 			mName = new string(mName->substr(0, len-2) + " " + mName->substr(len-2, 2));
 			return true;
 		}