diff --git a/code/nel/src/misc/common.cpp b/code/nel/src/misc/common.cpp
index c2c762ea0..decd52dbf 100644
--- a/code/nel/src/misc/common.cpp
+++ b/code/nel/src/misc/common.cpp
@@ -1033,6 +1033,7 @@ std::string expandEnvironmentVariables(const std::string &s)
 			{
 				// value not found
 				found = false;
+				nlwarning("Environment variable '%s' not found, won't be replaced", name.c_str());
 			}
 		}