diff --git a/port/stm32-f4discovery-cc256x/README.md b/port/stm32-f4discovery-cc256x/README.md
index ca2e77d7a..eb6484823 100644
--- a/port/stm32-f4discovery-cc256x/README.md
+++ b/port/stm32-f4discovery-cc256x/README.md
@@ -1,7 +1,7 @@
 # BTstack Port for STM32 F4 Discovery Board with CC256x
 
 This port uses the STM32 F4 Discovery Board with TI's CC256XEM ST Adapter Kit that allows to plug in a CC256xB or CC256xC Bluetooth module.
-STCubeMX was used to provide the HAL, initialize the device, and the Makefile. For easy development, Ozone project files are generated as well.
+STCubeMX was used to provide the HAL, initialize the device, and create an initial CMakeLists.txt. For easy development, Ozone project files are generated as well.
 
 ## Hardware
 
@@ -17,16 +17,18 @@ The module with the older CC2564B is around USD 20, while the one with the new C
 
 ## Software
 
-To build all examples, run make
-
-	$ make
+The build system uses CMake. To build all examples, run `cmake` and `make` in the build folder. The examples are built with
+    
+    $ mkdir build
+    $ cd build
+    $ cmake ..
+    $ make
 
 All examples and the .jedbug Ozone project files are placed in the 'build' folder.
 
-
 ## Flash And Run The Examples
 
-The Makefile builds different versions: 
+Cmake builds different versions: 
 - example.elf: .elf file with all debug information
 - example.bin: .bin file that can be used for flashing
 
@@ -48,7 +50,7 @@ In src/btstack_config.h resp. in example/btstack_config.h of the generated proje
 Also, the full packet log can be enabled in src/port.c resp. btstack/port/stm32-f4discovery-cc256x/src/port.c by uncommenting the hci_dump_init(..) line. The console output can then be converted into .pklg files for OS X PacketLogger or WireShark by running tool/create_packet_log.py
 
 ## GATT Database
-In BTstack, the GATT Database is defined via the .gatt file in the example folder. The Makefile contains rules to update the .h file when the .gatt was modified.
+In BTstack, the GATT Database is defined via the .gatt file in the example folder. The CMakeLists.txt contains rules to update the .h file when the .gatt was modified.
 
 
 ## Maintainer Notes - Updating The Port