diff --git a/src/debug.cpp b/src/debug.cpp
index 35988e3..7790a3b 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -1,73 +1,74 @@
 /*
  * Copyright 2015  Daniel Vrátil <dvratil@redhat.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library. If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "debug.h"
 #include "async.h"
 
 #include <QStringBuilder>
 
 #ifdef __GNUG__
 #include <cxxabi.h>
 #include <memory>
+#include <cstdlib>
 #endif
 
 namespace KAsync
 {
 
 Q_LOGGING_CATEGORY(Debug, "org.kde.async", QtWarningMsg)
 Q_LOGGING_CATEGORY(Trace, "org.kde.async.trace", QtWarningMsg)
 
 QString demangleName(const char *name)
 {
 #ifdef __GNUG__
     int status = 1; // uses -3 to 0 error codes
     std::unique_ptr<char, void(*)(void*)> demangled(abi::__cxa_demangle(name, 0, 0, &status), std::free);
     if (status == 0) {
         return QString::fromLatin1(demangled.get());
     }
 #endif
     return QString::fromLatin1(name);
 }
 
 }
 
 using namespace KAsync;
 
 int Tracer::lastId = 0;
 
 Tracer::Tracer(Private::Execution *execution)
     : mId(lastId++)
     , mExecution(execution)
 {
     msg(KAsync::Tracer::Start);
 }
 
 Tracer::~Tracer()
 {
     msg(KAsync::Tracer::End);
     // FIXME: Does this work on parallel executions?
     --lastId;
     --mId;
 }
 
 void Tracer::msg(Tracer::MsgType msgType)
 {
     qCDebug(Trace).nospace() << (QString().fill(QLatin1Char(' '), mId * 2) % 
                                  (msgType == KAsync::Tracer::Start ? QStringLiteral(" START ") : QStringLiteral(" END   ")) %
                                  QString::number(mId) % QStringLiteral(" ") %
                                  mExecution->executor->mExecutorName);
 }