Index: mumble-1.2.19/src/mumble/mumble.pro
===================================================================
--- mumble-1.2.19.orig/src/mumble/mumble.pro
+++ mumble-1.2.19/src/mumble/mumble.pro
@@ -224,6 +224,7 @@ unix {
 
     !CONFIG(no-speechd) {
       CONFIG *= speechd
+      INCLUDEPATH *= /usr/include/speech-dispatcher
     }
   }
 }