diff --git a/core/unixptyprocess.cpp b/core/unixptyprocess.cpp
index e7cfcb5..478b519 100644
--- a/core/unixptyprocess.cpp
+++ b/core/unixptyprocess.cpp
@@ -176,16 +176,31 @@ bool UnixPtyProcess::startProcess(const QString &shellPath, QStringList environm
         m_shellProcess.emitReadyRead();
     });
 
-    environment.append("TERM=xterm-256color");
-    environment.append("ITERM_PROFILE=Default");
-    environment.append("XPC_FLAGS=0x0");
-    environment.append("XPC_SERVICE_NAME=0");
-    environment.append("LANG=en_US.UTF-8");
-    environment.append("LC_ALL=en_US.UTF-8");
-    environment.append("LC_CTYPE=UTF-8");
-    environment.append("INIT_CWD=" + QCoreApplication::applicationDirPath());
-    environment.append("COMMAND_MODE=unix2003");
-    environment.append("COLORTERM=truecolor");
+    QStringList defaultVars;
+
+    defaultVars.append("TERM=xterm-256color");
+    defaultVars.append("ITERM_PROFILE=Default");
+    defaultVars.append("XPC_FLAGS=0x0");
+    defaultVars.append("XPC_SERVICE_NAME=0");
+    defaultVars.append("LANG=en_US.UTF-8");
+    defaultVars.append("LC_ALL=en_US.UTF-8");
+    defaultVars.append("LC_CTYPE=UTF-8");
+    defaultVars.append("INIT_CWD=" + QCoreApplication::applicationDirPath());
+    defaultVars.append("COMMAND_MODE=unix2003");
+    defaultVars.append("COLORTERM=truecolor");
+
+    QStringList varNames;
+    foreach (QString line, environment)
+    {
+        varNames.append(line.split("=").first());
+    }
+
+    //append default env vars only if they don't exists in current env
+    foreach (QString defVar, defaultVars)
+    {
+        if (!varNames.contains(defVar.split("=").first()))
+            environment.append(defVar);
+    }
 
     QProcessEnvironment envFormat;
     foreach (QString line, environment)
@@ -266,9 +281,9 @@ IPtyProcess::PtyType UnixPtyProcess::type()
 QString UnixPtyProcess::dumpDebugInfo()
 {
     return QString("PID: %1, In: %2, Out: %3, Type: %4, Cols: %5, Rows: %6, IsRunning: %7, Shell: %8, SlaveName: %9")
-                .arg(m_pid).arg(m_shellProcess.m_handleMaster).arg(m_shellProcess.m_handleSlave).arg(type())
-                .arg(m_size.first).arg(m_size.second).arg(m_shellProcess.state() == QProcess::Running)
-                .arg(m_shellPath).arg(m_shellProcess.m_handleSlaveName);
+            .arg(m_pid).arg(m_shellProcess.m_handleMaster).arg(m_shellProcess.m_handleSlave).arg(type())
+            .arg(m_size.first).arg(m_size.second).arg(m_shellProcess.state() == QProcess::Running)
+            .arg(m_shellPath).arg(m_shellProcess.m_handleSlaveName);
 }
 #endif