diff --git a/.gitignore b/.gitignore
index c745919..a054091 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 bin
 build
+.idea
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0b191a6..3fadc6d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,5 +14,9 @@ include_directories(
 	include
 )
 
+if(UNIX)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+endif(UNIX)
+
 add_subdirectory(src)
 add_subdirectory(sample)
diff --git a/include/profiler/profiler.h b/include/profiler/profiler.h
index 6bc88ab..e6650d0 100644
--- a/include/profiler/profiler.h
+++ b/include/profiler/profiler.h
@@ -49,7 +49,7 @@ along with this program.If not, see <http://www.gnu.org/licenses/>.
 #define PROFILER_DISABLE profiler::setEnabled(false);
 
 #include <stdint.h>
-
+#include <cstddef>
 
 #ifdef _WIN32
 #ifdef	_BUILD_PROFILER
diff --git a/src/block.cpp b/src/block.cpp
index 05646f1..e321eec 100644
--- a/src/block.cpp
+++ b/src/block.cpp
@@ -21,7 +21,7 @@ name(_name),
 type(0)
 {
 	tick(begin);
-	thread_id = std::this_thread::get_id().hash();
+	thread_id = std::hash<std::thread::id>()(std::this_thread::get_id());
 }
 
 void Mark::tick(timestamp_t& stamp)