diff --git a/NEWS.md b/NEWS.md
index d407b474..b9300a12 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,6 @@
 Version 0.8.10 For Dev-C++ 7 Beta
  - fix: Shouldn't update auto link settings, if the header name to be modified is unchanged
+ - fix: add unit to project not correctly set new unit file's encoding
 
 Version 0.8.9 For Dev-C++ 7 Beta
  - fix: text color of labels in statusbar not correctly updated when change theme
diff --git a/RedPandaIDE/compiler/projectcompiler.cpp b/RedPandaIDE/compiler/projectcompiler.cpp
index cfeb7cbd..d6b65313 100644
--- a/RedPandaIDE/compiler/projectcompiler.cpp
+++ b/RedPandaIDE/compiler/projectcompiler.cpp
@@ -340,14 +340,14 @@ void ProjectCompiler::writeMakeObjFilesRules(QFile &file)
                         encodingStr = QString(" -finput-charset=%1 -fexec-charset=%2")
                                 .arg(unit->editor()->fileEncoding(),
                                      defaultSystemEncoding);
-                } else if (unit->encoding()!=ENCODING_ASCII) {
-                    encodingStr = QString(" -finput-charset=%1 -fexec-charset=%2")
-                          .arg(unit->encoding(),
-                               defaultSystemEncoding);
-                } else if (unit->encoding()!=ENCODING_SYSTEM_DEFAULT) {
+                } else if (unit->encoding()==ENCODING_SYSTEM_DEFAULT) {
                     encodingStr = QString(" -finput-charset=%1 -fexec-charset=%2")
                           .arg(defaultSystemEncoding,
                                defaultSystemEncoding);
+                } else if (unit->encoding()!=ENCODING_ASCII && !unit->encoding().isEmpty()) {
+                    encodingStr = QString(" -finput-charset=%1 -fexec-charset=%2")
+                          .arg(unit->encoding(),
+                               defaultSystemEncoding);
                 }
             }
 
diff --git a/RedPandaIDE/project.cpp b/RedPandaIDE/project.cpp
index 9ce69b01..fc228a73 100644
--- a/RedPandaIDE/project.cpp
+++ b/RedPandaIDE/project.cpp
@@ -260,7 +260,7 @@ PProjectUnit Project::newUnit(PFolderNode parentNode, const QString& customFileN
     newUnit->setOverrideBuildCmd(false);
     newUnit->setBuildCmd("");
     newUnit->setModified(true);
-    newUnit->setEncoding(toByteArray(options().encoding));
+    newUnit->setEncoding(toByteArray(mOptions.encoding));
     return newUnit;
 }
 
@@ -285,7 +285,7 @@ Editor *Project::openUnit(int index)
         editor = pMainWindow->editorList()->newEditor(fullPath, encoding, true, unit->isNew());
         editor->setInProject(true);
         unit->setEditor(editor);
-        unit->setEncoding(encoding);
+        //unit->setEncoding(encoding);
         editor->activate();
         loadUnitLayout(editor,index);
         return editor;
@@ -788,6 +788,7 @@ PProjectUnit Project::addUnit(const QString &inFileName, PFolderNode parentNode,
     newUnit = std::make_shared<ProjectUnit>(this);
 
     // Set all properties
+    newUnit->setEncoding(toByteArray(mOptions.encoding));
     newUnit->setFileName(QDir(directory()).filePath(inFileName));
     newUnit->setNew(false);
     newUnit->setEditor(nullptr);