diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index 4afadb282..710d5f147 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -65,6 +65,7 @@ ALWAYS_DETAILED_SEC    = YES
 WARN_IF_UNDOCUMENTED   = @DOXYGEN_WARN_UNDOCUMENTED@
 EXTRACT_ALL            = @DOXYGEN_EXTRACT_ALL@
 HIDE_UNDOC_RELATIONS   = NO
+EXTRACT_STATIC         = @DOXYGEN_EXTRACT_ALL@
 
 MACRO_EXPANSION        = YES