diff --git a/NEWS.md b/NEWS.md
index 124b8f39..8515fba9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -15,6 +15,7 @@ Red Panda C++ Version 1.0.2
   - enhancement: only tag the first inconstantency when running problem case, to greatly reduce compare & display time
   - fix: can't stop a freeze program that has stdin redirected.
   - enhancement: context menu for problem cases table 
+  - fix: error in auto generate makefile under linux
 
 Red Panda C++ Version 1.0.1
   - fix: only convert project icon file when it's filename doesn't end with ".ico"
diff --git a/RedPandaIDE/compiler/projectcompiler.cpp b/RedPandaIDE/compiler/projectcompiler.cpp
index 26ce0db9..d277d312 100644
--- a/RedPandaIDE/compiler/projectcompiler.cpp
+++ b/RedPandaIDE/compiler/projectcompiler.cpp
@@ -284,9 +284,9 @@ void ProjectCompiler::writeMakeClean(QFile &file)
 {
     writeln(file, "clean: clean-custom");
     if (mProject->options().type == ProjectType::DynamicLib)
-        writeln(file, "\t${RM} $(CLEANOBJ) $(BIN) $(DEF) $(STATIC) > NUL 2>&1");
+        writeln(file, QString("\t${RM} $(CLEANOBJ) $(BIN) $(DEF) $(STATIC) > %1 2>&1").arg(NULL_FILE));
     else
-        writeln(file, "\t${RM} $(CLEANOBJ) $(BIN) > NUL 2>&1");
+        writeln(file, QString("\t${RM} $(CLEANOBJ) $(BIN) > %1 2>&1").arg(NULL_FILE));
     writeln(file);
 }
 
diff --git a/RedPandaIDE/mainwindow.h b/RedPandaIDE/mainwindow.h
index fe75e0af..ad2906c4 100644
--- a/RedPandaIDE/mainwindow.h
+++ b/RedPandaIDE/mainwindow.h
@@ -282,7 +282,7 @@ private slots:
     void onProblemSetIndexChanged(const QModelIndex &current, const QModelIndex &previous);
     void onProblemCaseIndexChanged(const QModelIndex &current, const QModelIndex &previous);
     void onProblemNameChanged(int index);
-    void onRroblemRunCurrentCase();
+    void onProblemRunCurrentCase();
     void onNewProblemConnection();
     void updateProblemTitle();
     void onEditorClosed();
diff --git a/RedPandaIDE/project.cpp b/RedPandaIDE/project.cpp
index a03f7ade..ff22deb8 100644
--- a/RedPandaIDE/project.cpp
+++ b/RedPandaIDE/project.cpp
@@ -698,6 +698,7 @@ void Project::setCompilerSet(int compilerSetIndex)
     if (mOptions.compilerSet != compilerSetIndex) {
         mOptions.compilerSet = compilerSetIndex;
         updateCompilerSetType();
+        setModified(true);
     }
 }