diff --git a/openttd.vcproj b/openttd.vcproj
--- a/openttd.vcproj
+++ b/openttd.vcproj
@@ -48,6 +48,7 @@
WarnAsError="TRUE"
SuppressStartupBanner="TRUE"
DebugInformationFormat="3"
+ CallingConvention="1"
CompileAs="1"/>
@@ -114,7 +115,7 @@
SuppressStartupBanner="TRUE"
Detect64BitPortabilityProblems="FALSE"
DebugInformationFormat="4"
- CallingConvention="0"
+ CallingConvention="1"
CompileAs="1"/>
@@ -740,15 +741,15 @@
Name="AI Files"
Filter="">
-
-
+
+