diff --git a/extern/weakjack/weak_libjack.c b/extern/weakjack/weak_libjack.c
index 23886de16..f1c7d4bae 100644
--- a/extern/weakjack/weak_libjack.c
+++ b/extern/weakjack/weak_libjack.c
@@ -19,6 +19,8 @@
 
 #include "weak_libjack.h"
 
+#define NDEBUG
+
 #ifndef USE_WEAK_JACK
 
 int have_libjack (void) {
diff --git a/src/audio/jack.h b/src/audio/jack.h
index 588814479..41d76824b 100644
--- a/src/audio/jack.h
+++ b/src/audio/jack.h
@@ -18,7 +18,7 @@
  */
 
 #include "taAudio.h"
-#include "../extern/weakjack/weak_libjack.h"
+#include "../../extern/weakjack/weak_libjack.h"
 
 class TAAudioJACK: public TAAudio {
   jack_client_t* ac;