diff --git a/readme.txt b/readme.txt
index 6424696ce..4089bc351 100644
--- a/readme.txt
+++ b/readme.txt
@@ -113,6 +113,7 @@
 - RT:  Merged RT4.
 - NIL: Merged NIL2.
 - NIL: Added STM32F7 demo.
+- HAL: Fixed wrong comments in STM32F4xx GPT demo (bug #748).
 - HAL: Fixed wrong comments and indents in STM32F7xx-GPT-ADC and 
        STM32L4-GPT-ADC demos (bug #747).
 - HAL: Fixed wrong comments and indent in STM32F4xx and STM32F7xx 
diff --git a/testhal/STM32/STM32F4xx/GPT/main.c b/testhal/STM32/STM32F4xx/GPT/main.c
index 34128eb0c..f50e57453 100644
--- a/testhal/STM32/STM32F4xx/GPT/main.c
+++ b/testhal/STM32/STM32F4xx/GPT/main.c
@@ -39,7 +39,7 @@ static void gpt3cb(GPTDriver *gptp) {
 }
 
 /*
- * GPT2 configuration.
+ * GPT4 configuration.
  */
 static const GPTConfig gpt4cfg = {
   10000,    /* 10kHz timer clock.*/