diff --git a/firmware/inc/isr.h b/firmware/inc/isr.h
index c1e95d6..aedd8b1 100644
--- a/firmware/inc/isr.h
+++ b/firmware/inc/isr.h
@@ -17,7 +17,7 @@
 
 struct ChainedIsr {
     link_t node;
-    bool (*const func)(struct ChainedIsr *);
+    bool (*func)(struct ChainedIsr *);
 };
 
 static inline void chainIsr(struct ChainedInterrupt *interrupt, struct ChainedIsr *isr)