diff --git a/flash.h b/flash.h
index 00b4c80..a2ff912 100644
--- a/flash.h
+++ b/flash.h
@@ -481,7 +481,7 @@
 
 /* flashrom.c */
 void mmap_errmsg();
-int map_flash_registers(struct flashchip *flash);
+void map_flash_registers(struct flashchip *flash);
 
 /* layout.c */
 int show_id(uint8_t *bios, int size, int force);
diff --git a/flashrom.c b/flashrom.c
index 4d8614a..eb0d8e0 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -95,7 +95,7 @@
 	}
 }
 
-int map_flash_registers(struct flashchip *flash)
+void map_flash_registers(struct flashchip *flash)
 {
 	volatile uint8_t *registers;
 	size_t size = flash->total_size * 1024;
@@ -109,8 +109,6 @@
 		exit(1);
 	}
 	flash->virtual_registers = registers;
-
-	return 0;
 }
 
 struct flashchip *probe_flash(struct flashchip *first_flash, int force)