diff --git a/libs/ardour/minibpm.cc b/libs/ardour/minibpm.cc
index 750de68e78..5cbe016b14 100644
--- a/libs/ardour/minibpm.cc
+++ b/libs/ardour/minibpm.cc
@@ -520,6 +520,8 @@ public:
 
 	if (acfLength < maxlag) {
 	    // Not enough data
+	    delete [] acf;
+	    delete [] temp;
 	    return 0.0;
 	}