1 files changed, 4 insertions, 1 deletions

diff --git a/firmware/target/arm/system-target.h b/firmware/target/arm/system-target.h
index 7a1ff4f79a..6e433be9d5 100644
--- a/firmware/target/arm/system-target.h
+++ b/firmware/target/arm/system-target.h
@@ -46,6 +46,10 @@
 #define inw(a) (*(volatile unsigned short *) (a))
 #define outw(a,b) (*(volatile unsigned short *) (b) = (a))
 
+#if defined(HAVE_ADJUSTABLE_CPU_FREQ) && NUM_CORES > 1
+extern struct spinlock boostctrl_spin;
+#endif
+
 static inline void udelay(unsigned usecs)
 {
     unsigned stop = USEC_TIMER + usecs;
@@ -107,7 +111,6 @@ void flush_icache(void);
 
 #endif /* CPU_PP502x */
 
-
 #endif /* CPU_PP */
 
 #endif /* SYSTEM_TARGET_H */