diff --git a/lib/efi_loader/efi_bootbin.c b/lib/efi_loader/efi_bootbin.c
index a97d3a0..428991d 100644
--- a/lib/efi_loader/efi_bootbin.c
+++ b/lib/efi_loader/efi_bootbin.c
@@ -159,7 +159,7 @@
  * @source_size:	size of the UEFI image
  * Return:		status code
  */
-efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
+static efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
 {
 	efi_handle_t mem_handle = NULL, handle;
 	struct efi_device_path *file_path = NULL;