diff --git a/src/flash/flash.c b/src/flash/flash.c
index bdee53b62..03d4547d4 100644
--- a/src/flash/flash.c
+++ b/src/flash/flash.c
@@ -847,7 +847,7 @@ COMMAND_HANDLER(handle_flash_write_bank_command)
 
 	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
-		command_print(cmd_ctx, "wrote %lld byte from file %s to flash bank %u"
+		command_print(cmd_ctx, "wrote %zu byte from file %s to flash bank %u"
 				" at offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
 				fileio.size, args[1], p->bank_number, offset,
 				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
diff --git a/src/flash/mflash.c b/src/flash/mflash.c
index 49dc432f3..4356f2709 100644
--- a/src/flash/mflash.c
+++ b/src/flash/mflash.c
@@ -750,7 +750,7 @@ COMMAND_HANDLER(mg_write_cmd)
 
 	if (duration_measure(&bench) == ERROR_OK)
 	{
-		command_print(cmd_ctx, "wrote %lli byte from file %s "
+		command_print(cmd_ctx, "wrote %zu byte from file %s "
 				"in %fs (%0.3f kB/s)", fileio.size, args[1],
 				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
 	}
diff --git a/src/flash/nand.c b/src/flash/nand.c
index fba8104a6..9d997fadd 100644
--- a/src/flash/nand.c
+++ b/src/flash/nand.c
@@ -1637,7 +1637,7 @@ COMMAND_HANDLER(handle_nand_dump_command)
 
 	if (nand_fileio_finish(&s) == ERROR_OK)
 	{
-		command_print(cmd_ctx, "dumped %lld byte in %fs (%0.3f kb/s)", 
+		command_print(cmd_ctx, "dumped %zu bytes in %fs (%0.3f kb/s)", 
 				s.fileio.size, duration_elapsed(&s.bench),
 				duration_kbps(&s.bench, s.fileio.size));
 	}
diff --git a/src/helper/fileio.c b/src/helper/fileio.c
index 71cae7581..84d46bd57 100644
--- a/src/helper/fileio.c
+++ b/src/helper/fileio.c
@@ -137,7 +137,7 @@ int fileio_close(struct fileio *fileio)
 
 	retval = fileio_close_local(fileio);
 
-	free(fileio->url);
+	free((void*)fileio->url);
 	fileio->url = NULL;
 
 	return retval;
diff --git a/src/helper/fileio.h b/src/helper/fileio.h
index 8cba926a0..6ed6fe454 100644
--- a/src/helper/fileio.h
+++ b/src/helper/fileio.h
@@ -47,8 +47,8 @@ enum fileio_access
 };
 
 struct fileio {
-	char *url;
-	long long size;
+	const char *url;
+	ssize_t size;
 	enum fileio_type type;
 	enum fileio_access access;
 	FILE *file;
diff --git a/src/target/target.c b/src/target/target.c
index c24085f14..f141e933f 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -2543,7 +2543,7 @@ COMMAND_HANDLER(handle_dump_image_command)
 	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
 	{
 		command_print(cmd_ctx,
-				"dumped %lld bytes in %fs (%0.3f kb/s)", fileio.size,
+				"dumped %zu bytes in %fs (%0.3f kb/s)", fileio.size,
 				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
 	}