diff --git a/src/audio/jack.cpp b/src/audio/jack.cpp
index fd2c13906..eaaa04254 100644
--- a/src/audio/jack.cpp
+++ b/src/audio/jack.cpp
@@ -68,8 +68,8 @@ bool TAAudioJACK::quit() {
     delete[] outBufs[i];
   }
 
-  delete[] iInBufs;
-  delete[] iOutBufs;
+  if (iInBufs!=NULL) delete[] iInBufs;
+  if (iOutBufs!=NULL) delete[] iOutBufs;
   delete[] inBufs;
   delete[] outBufs;
   delete[] ai;
diff --git a/src/audio/jack.h b/src/audio/jack.h
index e37aa5891..077620e1e 100644
--- a/src/audio/jack.h
+++ b/src/audio/jack.h
@@ -23,5 +23,7 @@ class TAAudioJACK: public TAAudio {
     TAAudioJACK():
       ac(NULL),
       ai(NULL),
-      ao(NULL) {}
+      ao(NULL),
+      iInBufs(NULL),
+      iOutBufs(NULL) {}
 };