diff --git a/ICSharpCode.Decompiler/CSharp/WholeProjectDecompiler.cs b/ICSharpCode.Decompiler/CSharp/WholeProjectDecompiler.cs
index 892a751366..7ad19203db 100644
--- a/ICSharpCode.Decompiler/CSharp/WholeProjectDecompiler.cs
+++ b/ICSharpCode.Decompiler/CSharp/WholeProjectDecompiler.cs
@@ -219,8 +219,8 @@ void WriteProjectFile(TextWriter writer, IEnumerable<Tuple<string, string>> file
 				w.WriteStartElement("PropertyGroup"); // platform-specific
 				w.WriteAttributeString("Condition", " '$(Platform)' == '" + platformName + "' ");
 				w.WriteElementString("PlatformTarget", platformName);
-				if ((module.Reader.PEHeaders.CorHeader.Flags & CorFlags.Prefers32Bit) != 0) {
-					w.WriteElementString("Prefer32Bit", "True");
+				if (frameworkVersionNumber > 400 && platformName == "AnyCPU" && (module.Reader.PEHeaders.CorHeader.Flags & CorFlags.Prefers32Bit) == 0) {
+					w.WriteElementString("Prefer32Bit", "false");
 				}
 				w.WriteEndElement(); // </PropertyGroup> (platform-specific)