diff --git a/Telegram/SourceFiles/stdafx.h b/Telegram/SourceFiles/stdafx.h
index 12885f468..e87a6c5b0 100644
--- a/Telegram/SourceFiles/stdafx.h
+++ b/Telegram/SourceFiles/stdafx.h
@@ -25,6 +25,8 @@ Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
 
 #ifdef __cplusplus
 
+#include <cmath>
+
 #include <QtCore/QtCore>
 #include <QtWidgets/QtWidgets>
 #include <QtNetwork/QtNetwork>
diff --git a/Telegram/SourceFiles/types.h b/Telegram/SourceFiles/types.h
index bbf44693d..babef3cb0 100644
--- a/Telegram/SourceFiles/types.h
+++ b/Telegram/SourceFiles/types.h
@@ -650,6 +650,8 @@ MimeType mimeTypeForName(const QString &mime);
 MimeType mimeTypeForFile(const QFileInfo &file);
 MimeType mimeTypeForData(const QByteArray &data);
 
+#include <cmath>
+
 inline int rowscount(int fullCount, int countPerRow) {
 	return (fullCount + countPerRow - 1) / countPerRow;
 }
diff --git a/Telegram/Telegram.vcxproj b/Telegram/Telegram.vcxproj
index 8b18f8ada..cdde8b981 100644
--- a/Telegram/Telegram.vcxproj
+++ b/Telegram/Telegram.vcxproj
@@ -123,6 +123,7 @@
       <OptimizeReferences>true</OptimizeReferences>
       <IgnoreSpecificDefaultLibraries>
       </IgnoreSpecificDefaultLibraries>
+      <AdditionalOptions>/ignore:4099 %(AdditionalOptions)</AdditionalOptions>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Deploy|Win32'">
@@ -154,6 +155,7 @@
       <OptimizeReferences>true</OptimizeReferences>
       <IgnoreSpecificDefaultLibraries>
       </IgnoreSpecificDefaultLibraries>
+      <AdditionalOptions>/ignore:4099 %(AdditionalOptions)</AdditionalOptions>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>