diff --git a/doc/source/doxygen-docs/changelog.md b/doc/source/doxygen-docs/changelog.md
index ab10295fe6..374cccfe82 100644
--- a/doc/source/doxygen-docs/changelog.md
+++ b/doc/source/doxygen-docs/changelog.md
@@ -4,7 +4,8 @@
 - Changes in libraries:
   - \ref mrpt_obs_grp
     - mrpt::obs::CObservation::load() is now protected with a std::mutex for safe multi-threading usage.
-
+- BUG FIXES:
+  - Fix wrong filenames in `rawlog-edit --externalize` when sensor labels contain the `/` character (e.g. mimicking ROS topic names).
 
 # Version 2.11.5: Released Dec 21st, 2023
 - Changes in libraries:
diff --git a/libs/apps/src/rawlog-edit_externalize.cpp b/libs/apps/src/rawlog-edit_externalize.cpp
index 4f5c850817..c7495162ae 100644
--- a/libs/apps/src/rawlog-edit_externalize.cpp
+++ b/libs/apps/src/rawlog-edit_externalize.cpp
@@ -94,7 +94,9 @@ DECLARE_OP_FUNCTION(op_externalize)
 			using namespace std::string_literals;
 
 			const string label_time = format(
-				"%s_%.09f", obs->sensorLabel.c_str(),
+				"%s_%.09f",
+				mrpt::system::fileNameStripInvalidChars(obs->sensorLabel)
+					.c_str(),
 				timestampTotime_t(obs->timestamp));
 			if (IS_CLASS(*obs, CObservationStereoImages))
 			{