1 files changed, 4 insertions, 2 deletions

diff --git a/firmware/system.c b/firmware/system.c
index 111a94f80e..37631b8735 100644
--- a/firmware/system.c
+++ b/firmware/system.c
@@ -26,10 +26,12 @@
 #include "string.h"
 #include "file.h"
 
-#ifdef HAVE_ADJUSTABLE_CPU_FREQ
-long cpu_frequency SHAREDBSS_ATTR = CPU_FREQ;
+#ifndef CPU_FREQ
+#define CPU_FREQ (-1)
 #endif
 
+long cpu_frequency SHAREDBSS_ATTR = CPU_FREQ;
+
 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 static int boost_counter SHAREDBSS_ATTR = 0;
 static bool cpu_idle SHAREDBSS_ATTR = false;