--- src/common/utils.cpp 
+++ src/common/utils.cpp 
@@ -1026,6 +1026,13 @@
 			PathUtils::concatPath(s, configDir[prefType], name);
 			return s;
 		}
+
+                // Set relative path to Engine12 dynamic library
+                if(prefType == Firebird::IConfigManager::DIR_PLUGINS)
+                {
+                    s = name;
+                    return s;
+                }
 	}
 
 	switch(prefType)