diff --git a/rust/Makefile b/rust/Makefile
index cca4755581db13..85c1904b674b78 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -9,7 +9,9 @@ extra-$(CONFIG_RUST) += bindings_generated.rs
 obj-$(CONFIG_RUST) += alloc.o kernel.o
 extra-$(CONFIG_RUST) += exports_alloc_generated.h exports_kernel_generated.h
 
-ifndef CONFIG_RUST_BUILD_ASSERT_DENY
+ifdef CONFIG_RUST_BUILD_ASSERT_DENY
+extra-$(CONFIG_RUST) += build_error.o
+else
 obj-$(CONFIG_RUST) += build_error.o
 endif