diff --git a/lib/math/Kconfig b/lib/math/Kconfig
index f19bc9734fa7..0634b428d0cb 100644
--- a/lib/math/Kconfig
+++ b/lib/math/Kconfig
@@ -14,4 +14,4 @@ config PRIME_NUMBERS
 	  If unsure, say N.
 
 config RATIONAL
-	bool
+	tristate
diff --git a/lib/math/rational.c b/lib/math/rational.c
index c0ab51d8fbb9..ec59d426ea63 100644
--- a/lib/math/rational.c
+++ b/lib/math/rational.c
@@ -13,6 +13,7 @@
 #include <linux/export.h>
 #include <linux/minmax.h>
 #include <linux/limits.h>
+#include <linux/module.h>
 
 /*
  * calculate best rational approximation for a given fraction
@@ -106,3 +107,5 @@ void rational_best_approximation(
 }
 
 EXPORT_SYMBOL(rational_best_approximation);
+
+MODULE_LICENSE("GPL v2");