diff --git a/doc/xslt.html b/doc/xslt.html
index 93aee3ef..d68d6df2 100644
--- a/doc/xslt.html
+++ b/doc/xslt.html
@@ -1240,7 +1240,7 @@ Usage: xsltproc [options] stylesheet file [file ...]
       --timing: display the time used
       --repeat: run the transformation 20 times
       --debug: dump the tree of the result instead
-      --novalid: skip the Dtd loading phase
+      --novalid: skip the DTD loading phase
       --noout: do not dump the result
       --maxdepth val : increase the maximum depth
       --html: the input document is(are) an HTML file(s)
diff --git a/xsltproc/xsltproc.c b/xsltproc/xsltproc.c
index e978a63c..3e1a5406 100644
--- a/xsltproc/xsltproc.c
+++ b/xsltproc/xsltproc.c
@@ -498,7 +498,7 @@ static void usage(const char *name) {
     printf("\t--debug: dump the tree of the result instead\n");
 #endif
     printf("\t--dumpextensions: dump the registered extension elements and functions to stdout\n");
-    printf("\t--novalid skip the Dtd loading phase\n");
+    printf("\t--novalid skip the DTD loading phase\n");
     printf("\t--nodtdattr do not default attributes from the DTD\n");
     printf("\t--noout: do not dump the result\n");
     printf("\t--maxdepth val : increase the maximum depth\n");