diff --git a/port/libusb/CMakeLists.txt b/port/libusb/CMakeLists.txt
index 9a4027bf2..e2cbe8000 100644
--- a/port/libusb/CMakeLists.txt
+++ b/port/libusb/CMakeLists.txt
@@ -17,7 +17,8 @@ if(PORTAUDIO_FOUND)
 	include_directories(${PORTAUDIO_INCLUDE_DIRS})
 	link_directories(${PORTAUDIO_LIBRARY_DIRS})
 	link_libraries(${PORTAUDIO_LIBRARIES})
-	add_compile_definitions(HAVE_PORTAUDIO)
+	# CMake 3.12 - add_compile_definitions(HAVE_PORTAUDIO)
+	SET(CMAKE_C_FLAGS  "-DHAVE_PORTAUDIO")
 endif()
 
 # extra compiler warnings
diff --git a/test/pts/CMakeLists.txt b/test/pts/CMakeLists.txt
index b9629ecba..8ded2f31b 100644
--- a/test/pts/CMakeLists.txt
+++ b/test/pts/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.5)
+cmake_minimum_required (VERSION 3.12)
 project(PTS)
 
 # fink pkgconfig