diff --git a/appveyor.yml b/appveyor.yml
index 5362db1d..42d90afc 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -32,7 +32,13 @@ build_script:
 
     cd build.paho
 
+    if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2015" (
     "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64
+    )
+
+    if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2013" (
+    "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\vcvarsall.bat" x64
+    )
 
     cmake -G "NMake Makefiles" -DPAHO_WITH_SSL=TRUE -DPAHO_BUILD_DOCUMENTATION=FALSE -DPAHO_BUILD_SAMPLES=TRUE -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE ..