diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index 3b92f3e923..c6335f0c52 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -36,7 +36,14 @@
 #define EFI_ENABLE_CRITICAL_ENGINE_STOP TRUE
 #define EFI_ENABLE_ENGINE_WARNING TRUE
 
-#define EFI_USE_CCM TRUE
+#if !defined(EFI_ENABLE_ASSERTS)
+ #define EFI_USE_CCM TRUE
+#endif
+
+#ifndef SC_BUFFER_SIZE
+#define SC_BUFFER_SIZE 4000
+#endif
+
 
 /**
  * if you have a 60-2 trigger, or if you just want better performance, you
diff --git a/firmware/development/sensor_chart.cpp b/firmware/development/sensor_chart.cpp
index a9da392abf..ff97975f68 100644
--- a/firmware/development/sensor_chart.cpp
+++ b/firmware/development/sensor_chart.cpp
@@ -15,7 +15,7 @@
 #include "status_loop.h"
 
 #if EFI_TEXT_LOGGING
-static char LOGGING_BUFFER[4000] CCM_OPTIONAL;
+static char LOGGING_BUFFER[SC_BUFFER_SIZE] CCM_OPTIONAL;
 static Logging scLogging("analog chart", LOGGING_BUFFER, sizeof(LOGGING_BUFFER));
 #endif /* EFI_TEXT_LOGGING */