diff --git a/documentation/sdk-manual/sdk-appendix-customizing.xml b/documentation/sdk-manual/sdk-appendix-customizing.xml
index 2d1788660b..0f33d548cd 100644
--- a/documentation/sdk-manual/sdk-appendix-customizing.xml
+++ b/documentation/sdk-manual/sdk-appendix-customizing.xml
@@ -59,7 +59,7 @@
                 <ulink url='&YOCTO_DOCS_REF_URL;#var-SDK_INHERIT_BLACKLIST'><filename>SDK_INHERIT_BLACKLIST</filename></ulink>
                 are disabled.
                 Using <filename>SDK_INHERIT_BLACKLIST</filename> to disable
-                these classes is is the typical method to disable classes that
+                these classes is the typical method to disable classes that
                 are problematic or unnecessary in the SDK context.
                 The default value blacklists the
                 <ulink url='&YOCTO_DOCS_REF_URL;#ref-classes-buildhistory'><filename>buildhistory</filename></ulink>