diff --git a/lib/Kconfig b/lib/Kconfig
index 15019d2..ad0cd52 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -674,6 +674,13 @@
 	  See also SMBIOS_SYSINFO which allows SMBIOS values to be provided in
 	  the devicetree.
 
+config LIB_RATIONAL
+	bool "enable continued fraction calculation routines"
+
+config SPL_LIB_RATIONAL
+	bool "enable continued fraction calculation routines for SPL"
+	depends on SPL
+
 endmenu
 
 config ASN1_COMPILER