diff --git a/xalan-c.spec b/xalan-c.spec
index 87d7f62..d0cdbc8 100644
--- a/xalan-c.spec
+++ b/xalan-c.spec
@@ -63,6 +63,7 @@ Summary:        Documentation for xalan-c
 # Normally, we would enable the Doxygen PDF documentation as a lesser
 # substitute, but building it fails with:
 #   ! TeX capacity exceeded, sorry [pool size=5905151].
+BuildArch:      noarch
 
 %description doc
 Documentation for xalan-c. See https://apache.github.io/xalan-c/ for full HTML