diff --git a/src/external/OpenCTM-1.0.3/openctm.pro b/src/external/OpenCTM-1.0.3/openctm.pro
index c13b9f86e..15bbcaf17 100644
--- a/src/external/OpenCTM-1.0.3/openctm.pro
+++ b/src/external/OpenCTM-1.0.3/openctm.pro
@@ -9,7 +9,8 @@ INCLUDEPATH += ./lib ./lib/liblzma
 win32-msvc2005:QMAKE_CXXFLAGS += /nologo /Ox /W3 /c /DOPENCTM_STATIC /D_CRT_SECURE_NO_WARNINGS 
 win32-msvc2008:QMAKE_CXXFLAGS += /nologo /Ox /W3 /c /DOPENCTM_STATIC /D_CRT_SECURE_NO_WARNINGS 
 win32-msvc2010:QMAKE_CXXFLAGS += /nologo /Ox /W3 /c /DOPENCTM_STATIC /D_CRT_SECURE_NO_WARNINGS
-win32-msvc2012:QMAKE_CXXFLAGS += /nologo /Ox /W3 /c /DOPENCTM_STATIC /D_CRT_SECURE_NO_WARNINGS  
+win32-msvc2012:QMAKE_CXXFLAGS += /nologo /Ox /W3 /c /DOPENCTM_STATIC /D_CRT_SECURE_NO_WARNINGS
+win32-msvc2015:QMAKE_CXXFLAGS += /nologo /Ox /W3 /c /DOPENCTM_STATIC /D_CRT_SECURE_NO_WARNINGS    
 win32-g++:QMAKE_CXXFLAGS += -O3 -W -Wall -c -std=c99 -pedantic
 win32-g++:DEFINES += OPENCTM_STATIC
 linux-g++:QMAKE_CXXFLAGS += -O3 -W -Wall -c -std=c99 -pedantic