--- qsstv/sstv/sstvrx.cpp.orig	2019-05-06 07:53:31.704741523 -0700
+++ qsstv/sstv/sstvrx.cpp	2019-05-06 07:52:47.150425947 -0700
@@ -249,7 +249,7 @@
       switchState(SLANTADJUST); // for logging
       // clear the call received via fskID
       emit (resetCall());
-      [[fallthrough]];
+      Q_FALLTHROUGH();
 
     case SLANTADJUST:
       sampleCounterLatch=syncProcPtr->sampleCounter; //remember where we've got
--- qsstv/utils/qftp.cpp.orig	2019-05-06 07:51:54.980056714 -0700
+++ qsstv/utils/qftp.cpp	2019-05-06 07:54:24.872118397 -0700
@@ -1088,7 +1088,7 @@
     case SUCCESS:
       // success handling
       state = IDLE;
-      [[fallthrough]];
+      Q_FALLTHROUGH();
       // no break!
     case IDLE:
       if (dtp.hasError()) {