diff --git a/fs/initrd.c b/fs/initrd.c
index 6200a9ed..b836d79e 100644
--- a/fs/initrd.c
+++ b/fs/initrd.c
@@ -43,9 +43,9 @@ typedef struct {
 } initrd_header_t;
 
 typedef struct {
+	uint32_t length;
+	uint32_t offset;
 	char fname[MAX_FNAME];
-	size_t length;
-	off_t offset;
 } initrd_file_desc_t;
 
 static ssize_t initrd_read(vfs_node_t* node, uint8_t* buffer, size_t size, off_t offset)
diff --git a/tools/make_initrd.c b/tools/make_initrd.c
index 42613cbd..3a43798d 100644
--- a/tools/make_initrd.c
+++ b/tools/make_initrd.c
@@ -33,9 +33,9 @@ typedef struct {
 } initrd_header_t;
 
 typedef struct {
+	uint32_t length;
+	uint32_t offset;
 	char fname[MAX_FNAME];
-	size_t length;
-	off_t offset;
 } initrd_file_desc_t;
 
 static void print_options(void)