diff --git a/docs/Doxygen.conf b/docs/Doxygen.conf
index 5158754f9a..b87abdf82e 100644
--- a/docs/Doxygen.conf
+++ b/docs/Doxygen.conf
@@ -84,7 +84,7 @@ WARN_LOGFILE           =
 # configuration options related to the input files
 #---------------------------------------------------------------------------
 INPUT                  = ../src ../src/include ../src/include/private ../libs/esl/src ../libs/esl/src/include \
-                         ../src/libs/openzap ../src/libs/openzap/include \
+                         ../libs/openzap ../libs/openzap/src ../libs/openzap/src/include \
                          ../src/mod/applications/mod_cidlookup \
                          ../src/mod/applications/mod_commands \
                          ../src/mod/applications/mod_conference \