diff --git a/test/lib/Makefile b/test/lib/Makefile
index ada62fe46b7..22236f85875 100644
--- a/test/lib/Makefile
+++ b/test/lib/Makefile
@@ -7,7 +7,7 @@ obj-$(CONFIG_EFI_LOADER) += efi_device_path.o
 obj-$(CONFIG_EFI_SECURE_BOOT) += efi_image_region.o
 obj-y += hexdump.o
 obj-y += lmb.o
-obj-y += sscanf.o
+obj-$(CONFIG_SSCANF) += sscanf.o
 obj-y += string.o
 obj-$(CONFIG_ERRNO_STR) += test_errno_str.o
 obj-$(CONFIG_UT_LIB_ASN1) += asn1.o