diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index ceaf6e4d2855..cd06ed7d842d 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -27,10 +27,6 @@ config UID16
 	bool
 	default y
 
-config RWSEM_GENERIC_SPINLOCK
-	bool
-	default y
-
 config GENERIC_CALIBRATE_DELAY
 	bool
 	default y
diff --git a/arch/um/Kconfig.x86_64 b/arch/um/Kconfig.x86_64
index bd35e59419c8..aae19bc4b06a 100644
--- a/arch/um/Kconfig.x86_64
+++ b/arch/um/Kconfig.x86_64
@@ -6,6 +6,11 @@ config 64BIT
 	bool
 	default y
 
+#XXX: this is so in the underlying arch, but it's wrong!!!
+config RWSEM_GENERIC_SPINLOCK
+	bool
+	default y
+
 config SEMAPHORE_SLEEPERS
 	bool
 	default y