diff --git a/Contractor/Contractor.h b/Contractor/Contractor.h
index 469248700..0703be8bc 100644
--- a/Contractor/Contractor.h
+++ b/Contractor/Contractor.h
@@ -45,8 +45,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <boost/make_shared.hpp>
 #include <boost/shared_ptr.hpp>
 
-#include <ctime>
-
 #include <algorithm>
 #include <limits>
 #include <vector>
@@ -732,7 +730,7 @@ private:
             if ( priority > targetPriority )
                 return false;
             //tie breaking
-            if ( fabs(priority - targetPriority) < std::numeric_limits<double>::epsilon() && bias(node, target) ) {
+            if ( std::abs(priority - targetPriority) < std::numeric_limits<double>::epsilon() && bias(node, target) ) {
                 return false;
             }
             neighbours.push_back( target );
@@ -754,7 +752,7 @@ private:
                 if ( priority > targetPriority)
                     return false;
                 //tie breaking
-                if ( fabs(priority - targetPriority) < std::numeric_limits<double>::epsilon() && bias(node, target) ) {
+                if ( std::abs(priority - targetPriority) < std::numeric_limits<double>::epsilon() && bias(node, target) ) {
                     return false;
                 }
             }
diff --git a/DataStructures/StaticRTree.h b/DataStructures/StaticRTree.h
index 9c727fb46..9cd4b10c3 100644
--- a/DataStructures/StaticRTree.h
+++ b/DataStructures/StaticRTree.h
@@ -923,7 +923,7 @@ private:
     }
 
     inline bool DoubleEpsilonCompare(const double d1, const double d2) const {
-        return (std::fabs(d1 - d2) < std::numeric_limits<double>::epsilon() );
+        return (std::abs(d1 - d2) < std::numeric_limits<double>::epsilon() );
     }
 
 };
diff --git a/Extractor/ExtractorCallbacks.cpp b/Extractor/ExtractorCallbacks.cpp
index cf3114ad1..c1ef1326c 100644
--- a/Extractor/ExtractorCallbacks.cpp
+++ b/Extractor/ExtractorCallbacks.cpp
@@ -87,7 +87,7 @@ void ExtractorCallbacks::wayFunction(ExtractionWay &parsed_way) {
             parsed_way.speed = parsed_way.duration/(parsed_way.path.size()-1);
         }
 
-        if(std::numeric_limits<double>::epsilon() >= fabs(-1. - parsed_way.speed)){
+        if(std::numeric_limits<double>::epsilon() >= std::abs(-1. - parsed_way.speed)){
             SimpleLogger().Write(logDEBUG) <<
                 "found way with bogus speed, id: " << parsed_way.id;
             return;