--- CMakeLists.txt.orig	2015-01-12 13:06:37 UTC
+++ CMakeLists.txt
@@ -30,6 +30,7 @@ ENDIF(FFTW_FOUND)
 
 IF(PORTAUDIO_FOUND)
   set(SDR_WITH_PORTAUDIO ON)
+  set(PORTAUDIO_LIBRARIES)
 ELSE(PORTAUDIO_FOUND)
   set(PORTAUDIO_LIBRARIES)
 ENDIF(PORTAUDIO_FOUND)