diff --git a/firmware/config/boards/prometheus/board_configuration.cpp b/firmware/config/boards/prometheus/board_configuration.cpp
index 522fee8ff4..c1595ff308 100644
--- a/firmware/config/boards/prometheus/board_configuration.cpp
+++ b/firmware/config/boards/prometheus/board_configuration.cpp
@@ -132,7 +132,7 @@ void setSdCardConfigurationOverrides(void) {
 void setBoardConfigurationOverrides(void) {
 	// give a chance to trigger SWD programmer... Wait for 2 secs (=2000 ms).
 	// TODO: remove it when the bootloader is ready
-	Delay(2000);
+	chThdSleepMilliseconds(2000);
 
 	setSerialConfigurationOverrides();
 
diff --git a/firmware/global.h b/firmware/global.h
index 13188b95ef..4d1fac56c2 100644
--- a/firmware/global.h
+++ b/firmware/global.h
@@ -125,7 +125,6 @@ typedef unsigned int time_t;
  */
 #define NT2US(nt) ((nt) / US_TO_NT_MULTIPLIER)
 
-#define Delay(ms) chThdSleepMilliseconds(ms)
 #ifdef __cplusplus
 extern "C"
 {