diff --git a/appveyor.yml b/appveyor.yml
index f5753ee..cdb2448 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,7 +5,7 @@ configuration:
   - RelWithDebInfo
 
 before_build:
-  - cmake -G "Visual Studio 14 2015" source/compiler -DCPACK_GENERATOR=ZIP
+  - cmake -G "Visual Studio 12 2013" source/compiler -DCPACK_GENERATOR=ZIP
 
 build_script:
   - cmake --build . --config %CONFIGURATION%
diff --git a/source/compiler/CMakeLists.txt b/source/compiler/CMakeLists.txt
index 63a0e39..74d9d45 100644
--- a/source/compiler/CMakeLists.txt
+++ b/source/compiler/CMakeLists.txt
@@ -45,7 +45,11 @@ if(HAVE_STRLCAT)
 endif()
 
 if(MSVC)
-  add_definitions(-D_CRT_SECURE_NO_WARNINGS /J)
+  add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE /J)
+  if(MSVC LESS 1900)
+    # MSVC 2013 and below don't support the "inline" keyword
+    add_definitions(-Dinline=__inline)
+  endif()
 endif()
 
 if(UNIX)