--- a/gbversion.h.in
+++ b/gbversion.h.in
@@ -13,5 +13,5 @@
 #define VER_PRODUCT_STR  "@GBMAJOR@.@GBMINOR@.@GBMICRO@@PACKAGE_RELEASE@"
 #else
 #define VERSION "@GBMAJOR@.@GBMINOR@.@GBMICRO@@PACKAGE_RELEASE@"
-#define WEB_DOC_DIR "https://www.gpsbabel.org/htmldoc-@DOCVERSION@"
+#define WEB_DOC_DIR "file:///usr/share/doc/gpsbabel/gpsbabel.html"
 #endif
--- a/testo.d/serialization.test
+++ b/testo.d/serialization.test
@@ -7,7 +7,7 @@
 # the GUI and the document.
 # We do a compare_nole as specific whitespace is part of deserialization.
 gpsbabel -^3 > ${TMPDIR}/format3.txt
-sed 's,https://www.gpsbabel.org/htmldoc-.[^/]*/,https://www.gpsbabel.org/WEB_DOC_DIR/,' ${TMPDIR}/format3.txt >${TMPDIR}/format3.fiddled.txt
+sed 's,file:///usr/share/doc/gpsbabel/gpsbabel.html/,https://www.gpsbabel.org/WEB_DOC_DIR/,' ${TMPDIR}/format3.txt >${TMPDIR}/format3.fiddled.txt
 compare_nole ${REFERENCE}/format3.txt ${TMPDIR}/format3.fiddled.txt
 gpsbabel -^2 > ${TMPDIR}/format2.txt
 compare_nole ${REFERENCE}/format2.txt ${TMPDIR}/format2.txt
@@ -16,7 +16,7 @@ compare_nole ${REFERENCE}/format1.txt ${TMPDIR}/format1.txt
 gpsbabel -^0 > ${TMPDIR}/format0.txt
 compare_nole ${REFERENCE}/format0.txt ${TMPDIR}/format0.txt
 gpsbabel -%1 > ${TMPDIR}/filter1.txt
-sed 's,https://www.gpsbabel.org/htmldoc-.[^/]*/,https://www.gpsbabel.org/WEB_DOC_DIR/,' ${TMPDIR}/filter1.txt >${TMPDIR}/filter1.fiddled.txt
+sed 's,file:///usr/share/doc/gpsbabel/gpsbabel.html/,https://www.gpsbabel.org/WEB_DOC_DIR/,' ${TMPDIR}/filter1.txt >${TMPDIR}/filter1.fiddled.txt
 compare_nole ${REFERENCE}/filter1.txt ${TMPDIR}/filter1.fiddled.txt
 gpsbabel -%0 > ${TMPDIR}/filter0.txt
 compare_nole ${REFERENCE}/filter0.txt ${TMPDIR}/filter0.txt
--- a/xmldoc/gpsbabel_man.xml
+++ b/xmldoc/gpsbabel_man.xml
@@ -118,7 +118,7 @@ or as the backend for other tools. </para>
         </listitem>
       </varlistentry>
     </variablelist>
-    <para>Lists of filters and formats are given in the doc at https://www.gpsbabel.org. </para>
+    <para>Lists of filters and formats are given in the doc at /usr/share/doc/gpsbabel/. </para>
   </refsect1>
   <refsect1>
     <title>See Also</title>
