diff --git a/src/flash/stm32x.c b/src/flash/stm32x.c
index 5e1db209f..ae5701a22 100644
--- a/src/flash/stm32x.c
+++ b/src/flash/stm32x.c
@@ -670,8 +670,7 @@ int stm32x_probe(struct flash_bank_s *bank)
 	LOG_INFO( "flash size = %dkbytes", num_pages );
 	
 	/* calculate numbers of pages */
-	if (page_size - 1024)
-		num_pages /= (page_size - 1024);
+	num_pages /= (page_size / 1024);
 	
 	bank->base = 0x08000000;
 	bank->size = (num_pages * page_size);