diff --git a/src/flashcart/ed64/ed64_ll.c b/src/flashcart/ed64/ed64_ll.c
index c9256c0e..aa4d7676 100644
--- a/src/flashcart/ed64/ed64_ll.c
+++ b/src/flashcart/ed64/ed64_ll.c
@@ -32,6 +32,8 @@ void pi_dma_from_sram (void *dest, unsigned long offset, unsigned long size);
 void pi_dma_to_sram (void* src, unsigned long offset, unsigned long size);
 void pi_dma_from_cart_safe (void *dest, void *src, unsigned long size);
 
+void ed64_ll_set_sdcard_timing(void);
+
 
 #define SAV_EEP_ON 1
 #define SAV_SRM_ON 2