diff --git a/README.md b/README.md
index 66e36a8..57a9791 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,8 @@ Configuration:
 * `#define STA_PRINTF_USE_STDLIB`:  Use the stdlib implementation
 * `#define STA_PRINTF_USE_MPALAND`: Use the implementation by Marco Paland (thread safe & reentrant)
 
+Format printing floats needs to be manually enabled:
+Project Properties > C/C++-Build > Settings > MCU Settings -> "Use float with printf from newlib-nano"
 
 ## HAL Delay