diff --git a/doc/asdf.texinfo b/doc/asdf.texinfo
index 04d67be2da40b97e9b0e04d1382a0dce5c378b41..4899b2547c7851be274bed3a87c2faa45543839b 100644
--- a/doc/asdf.texinfo
+++ b/doc/asdf.texinfo
@@ -159,7 +159,7 @@ Components
 * Pre-defined subclasses of component::
 * Creating new component types::
 
-properties
+Properties
 
 * Pre-defined subclasses of component::
 * Creating new component types::
@@ -3179,7 +3179,7 @@ CL-USER> (asdf:component-pathname
 
 
 
-@subsubsection properties
+@subsubsection Properties
 
 This attribute is optional.