diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index f49c747ca3..eda607705c 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -77,7 +77,7 @@
 				BrowseInformation="1"
 				BrowseInformationFile="$(IntDir)/"
 				WarningLevel="3"
-				WarnAsError="true"
+				WarnAsError="false"
 				SuppressStartupBanner="true"
 				DebugInformationFormat="3"
 				CallingConvention="1"
@@ -285,7 +285,7 @@
 				ObjectFile="$(IntDir)/"
 				ProgramDataBaseFileName="$(IntDir)/$(TargetName).pdb"
 				WarningLevel="3"
-				WarnAsError="true"
+				WarnAsError="false"
 				SuppressStartupBanner="true"
 				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="4"
diff --git a/projects/openttd_vs80.vcproj.in b/projects/openttd_vs80.vcproj.in
index b5ae42e968..83dab75d32 100644
--- a/projects/openttd_vs80.vcproj.in
+++ b/projects/openttd_vs80.vcproj.in
@@ -77,7 +77,7 @@
 				BrowseInformation="1"
 				BrowseInformationFile="$(IntDir)/"
 				WarningLevel="3"
-				WarnAsError="true"
+				WarnAsError="false"
 				SuppressStartupBanner="true"
 				DebugInformationFormat="3"
 				CallingConvention="1"
@@ -285,7 +285,7 @@
 				ObjectFile="$(IntDir)/"
 				ProgramDataBaseFileName="$(IntDir)/$(TargetName).pdb"
 				WarningLevel="3"
-				WarnAsError="true"
+				WarnAsError="false"
 				SuppressStartupBanner="true"
 				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="4"