diff --git a/lib/Kconfig b/lib/Kconfig
index 85cf7ea978aafe6606e6e44cc634a82e6cf29477..7823f8342abf1c8f403a251b56d428dc9bf703a5 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -157,4 +157,11 @@ config CHECK_SIGNATURE
 config HAVE_LMB
 	boolean
 
+config CPUMASK_OFFSTACK
+	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
+	help
+	  Use dynamic allocation for cpumask_var_t, instead of putting
+	  them on the stack.  This is a bit more expensive, but avoids
+	  stack overflow.
+
 endmenu