diff --git a/default-configs/sparc64-softmmu.mak b/default-configs/sparc64-softmmu.mak
index ce63d47046..1fae4888db 100644
--- a/default-configs/sparc64-softmmu.mak
+++ b/default-configs/sparc64-softmmu.mak
@@ -17,3 +17,5 @@ CONFIG_SUNHME=y
 CONFIG_MC146818RTC=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_SUN4V_RTC=y
+CONFIG_SUN4U=y
+CONFIG_NIAGARA=y
diff --git a/hw/sparc64/Makefile.objs b/hw/sparc64/Makefile.objs
index 117e0ff27d..af0525c1a2 100644
--- a/hw/sparc64/Makefile.objs
+++ b/hw/sparc64/Makefile.objs
@@ -1,4 +1,4 @@
 obj-y += sparc64.o
-obj-y += sun4u_iommu.o
-obj-y += sun4u.o
-obj-y += niagara.o
\ No newline at end of file
+obj-$(CONFIG_SUN4U) += sun4u_iommu.o
+obj-$(CONFIG_SUN4U) += sun4u.o
+obj-$(CONFIG_NIAGARA) += niagara.o