diff --git a/firmware/include/memory.h b/firmware/include/memory.h
index d025bce610..105d0280b2 100644
--- a/firmware/include/memory.h
+++ b/firmware/include/memory.h
@@ -26,15 +26,4 @@
 
 void memset16(void *dst, int val, size_t len);
 
-/**
- * memswap128
- *
- * Exchanges the contents of two buffers.
- * For maximum efficiency, this function performs no aligning of addresses
- * and buf1, buf2 and len should be 16 byte (128 bit) aligned. Not being at
- * least longword aligned will fail on some architechtures. Any len mod 16
- * at the end is not swapped.
- */
-void memswap128(void *buf1, void *buf2, size_t len);
-
 #endif /* _MEMORY_H_ */