diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 38e7f464a0..897522ab2e 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1855,7 +1855,7 @@ Core layer for images cannot be removed
         <glossentry id='var-IMAGE_FSTYPES'><glossterm>IMAGE_FSTYPES</glossterm>
             <glossdef>
                 <para>
-                    Specifies the format of the root filesystem created by
+                    Specifies the formats of the root filesystem created by
                     the OpenEmbedded build system.
                     Available formats are a subset of the
                     supported images listed in