diff --git a/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs b/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs
index 2409c65a91..7f80f24771 100644
--- a/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs
+++ b/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs
@@ -385,5 +385,11 @@ public static Func<TCaptured> CapturedTypeParameter2<TNonCaptured, TCaptured>(TN
 				return captured.FirstOrDefault();
 			};
 		}
+
+		public static Func<int> Issue1773(short data)
+		{
+			int integerData = data;
+			return () => integerData;
+		}
 	}
 }
diff --git a/ICSharpCode.Decompiler/IL/Transforms/TransformDisplayClassUsage.cs b/ICSharpCode.Decompiler/IL/Transforms/TransformDisplayClassUsage.cs
index 7289797078..3338022779 100644
--- a/ICSharpCode.Decompiler/IL/Transforms/TransformDisplayClassUsage.cs
+++ b/ICSharpCode.Decompiler/IL/Transforms/TransformDisplayClassUsage.cs
@@ -314,7 +314,7 @@ protected internal override void VisitStObj(StObj inst)
 			} else {
 				// This is an uninitialized variable:
 				ILInstruction value;
-				if (inst.Value.MatchLdLoc(out var v) && v.Kind == VariableKind.Parameter && currentFunction == v.Function) {
+				if (inst.Value.MatchLdLoc(out var v) && v.Kind == VariableKind.Parameter && currentFunction == v.Function && v.Type.Equals(fieldType)) {
 					// Special case for parameters: remove copies of parameter values.
 					instructionsToRemove.Add(inst);
 					value = inst.Value;