diff --git a/customext/customext.mk.in b/customext/customext.mk.in
index 0dd725ef..4107d18a 100644
--- a/customext/customext.mk.in
+++ b/customext/customext.mk.in
@@ -1,6 +1,7 @@
 customext_subproject_deps = \
 	spike_main \
 	riscv \
+	disasm \
 	softfloat \
 
 customext_srcs = \