diff --git a/src/rcldb/rcldoc.cpp b/src/rcldb/rcldoc.cpp
index a45e18e5..b86e9f16 100644
--- a/src/rcldb/rcldoc.cpp
+++ b/src/rcldb/rcldoc.cpp
@@ -41,7 +41,7 @@ namespace Rcl {
     const string Doc::keykw("keywords");
     const string Doc::keymd5("md5");
 
-    void Doc::dump(bool dotext)
+    void Doc::dump(bool dotext) const
     {
         LOGDEB(("Rcl::Doc::dump: url: [%s]\n", url.c_str()));
         LOGDEB(("Rcl::Doc::dump: utf8fn: [%s]\n", utf8fn.c_str()));
diff --git a/src/rcldb/rcldoc.h b/src/rcldb/rcldoc.h
index a9e3d7ba..cf344361 100644
--- a/src/rcldb/rcldoc.h
+++ b/src/rcldb/rcldoc.h
@@ -135,7 +135,7 @@ class Doc {
 	xdocid = 0;
     }
 
-    void dump(bool dotext=false);
+    void dump(bool dotext=false) const;
 
     // The official names for recoll native fields when used in a text
     // context (ie: the python interface duplicates some of the fixed