diff --git a/src/TConfig.cpp b/src/TConfig.cpp
index 65c7ba0..8d445c9 100644
--- a/src/TConfig.cpp
+++ b/src/TConfig.cpp
@@ -106,6 +106,7 @@ void TConfig::FlushToFile() {
     if (N != Str.size()) {
         beammp_error("Failed to write to config file properly, config file might be misshapen");
     }
+    std::fclose(File);
 }
 
 void TConfig::CreateConfigFile(std::string_view name) {