diff --git a/doc/z3api.cfg.in b/doc/z3api.cfg.in
index 9e946aa7f..9c4b464c2 100644
--- a/doc/z3api.cfg.in
+++ b/doc/z3api.cfg.in
@@ -704,10 +704,13 @@ INPUT_ENCODING         = UTF-8
 FILE_PATTERNS          = website.dox \
                          z3_api.h \
                          z3_algebraic.h \
+                         z3_ast_containers.h \
+                         z3_fixedpoint.h \
+                         z3_fpa.h \
+                         z3_interp.h \
+                         z3_optimization.h \
                          z3_polynomial.h \
                          z3_rcf.h \
-                         z3_interp.h \
-                         z3_fpa.h \
                          z3++.h \
                          @PYTHON_API_FILES@ @DOTNET_API_FILES@ @JAVA_API_FILES@