diff -up kdelibs-3.5.10/kate/part/katebuffer.cpp.than kdelibs-3.5.10/kate/part/katebuffer.cpp
--- kdelibs-3.5.10/kate/part/katebuffer.cpp.than	2016-02-16 22:06:01.830197908 +0100
+++ kdelibs-3.5.10/kate/part/katebuffer.cpp	2016-02-16 23:33:15.810136589 +0100
@@ -42,6 +42,8 @@
 #include <qcstring.h>
 #include <qdatetime.h>
 
+#include <cmath>
+
 /**
  * loader block size, load 256 kb at once per default
  * if file size is smaller, fall back to file size
@@ -917,7 +919,7 @@ void KateBuffer::updatePreviousNotEmptyL
   } while (textLine->firstChar()==-1);
   kdDebug(13020)<<"updatePreviousNotEmptyLine: updating line:"<<(blk->startLine()+current_line)<<endl;
   QMemArray<uint> foldingList=textLine->foldingListArray();
-  while ( (foldingList.size()>0)  && ( abs(foldingList[foldingList.size()-2])==1)) {
+  while ( (foldingList.size()>0)  && ( std::abs(foldingList[foldingList.size()-2])==1)) {
     foldingList.resize(foldingList.size()-2,QGArray::SpeedOptim);
   }
   addIndentBasedFoldingInformation(foldingList,addindent,deindent);