diff --git a/libraries/Desktop/support/DataFlash_APM1.cpp b/libraries/Desktop/support/DataFlash_APM1.cpp
index d2e00f09d3..0b264a979d 100644
--- a/libraries/Desktop/support/DataFlash_APM1.cpp
+++ b/libraries/Desktop/support/DataFlash_APM1.cpp
@@ -106,10 +106,11 @@ void DataFlash_APM1::PageErase (uint16_t PageAdr)
 }
 
 
-void DataFlash_APM1::ChipErase ()
+void DataFlash_APM1::ChipErase(void (*delay_cb)(unsigned long))
 {
 	for (int i=0; DF_NUM_PAGES; i++) {
 		PageErase(i);
+        delay_cb(1);
 	}
 }