diff --git a/CMakeLists.txt b/CMakeLists.txt
index bcb73c7d7a9..ad60caf1f56 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -79,7 +79,7 @@ set(APP_VERSION 3.11.0)
 if(DEFINED ENV{MUDLET_VERSION_BUILD} AND NOT $ENV{MUDLET_VERSION_BUILD} STREQUAL "")
   SET(APP_BUILD $ENV{MUDLET_VERSION_BUILD})
 else()
-  set(APP_BUILD "")
+  set(APP_BUILD "-dev")
 endif()
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
diff --git a/src/mudlet.pro b/src/mudlet.pro
index 943ab33d04d..fef069f1074 100644
--- a/src/mudlet.pro
+++ b/src/mudlet.pro
@@ -149,7 +149,7 @@ BUILD = $$(MUDLET_VERSION_BUILD)
 isEmpty( BUILD ) {
 # Leave the value of the following empty for a release build
 # i.e. the line should be "BUILD =" without quotes
-  BUILD = ""
+  BUILD = "-dev"
 }
 
 # Changing BUILD and VERSION values affects: ctelnet.cpp, main.cpp, mudlet.cpp