diff --git a/firmware/config/boards/prometheus/prometheus-common.mk b/firmware/config/boards/prometheus/prometheus-common.mk
index 1923b42c38..c53f0c82b5 100644
--- a/firmware/config/boards/prometheus/prometheus-common.mk
+++ b/firmware/config/boards/prometheus/prometheus-common.mk
@@ -15,7 +15,7 @@ BOOTLOADERINC= $(PROJECT_DIR)/bootloader/prometheus/$(PROMETHEUS_BOARD)
 
 # Default to a release build - clear EXTRA_PARAMS from cmdline to build debug
 ifeq ($(EXTRA_PARAMS),)
-	EXTRA_PARAMS=-DEFI_ENABLE_ASSERTS=FALSE-DCH_DBG_ENABLE_ASSERTS=FALSE -DCH_DBG_ENABLE_STACK_CHECK=FALSE -DCH_DBG_FILL_THREADS=FALSE -DCH_DBG_THREADS_PROFILING=FALSE
+	EXTRA_PARAMS=-DEFI_ENABLE_ASSERTS=FALSE -DCH_DBG_ENABLE_ASSERTS=FALSE -DCH_DBG_ENABLE_STACK_CHECK=FALSE -DCH_DBG_FILL_THREADS=FALSE -DCH_DBG_THREADS_PROFILING=FALSE
 endif
 ifeq ($(DEBUG_LEVEL_OPT),)
 	DEBUG_LEVEL_OPT = -O2