diff --git a/ICSharpCode.Decompiler/IL/Transforms/EarlyExpressionTransforms.cs b/ICSharpCode.Decompiler/IL/Transforms/EarlyExpressionTransforms.cs
index 2316732e90..fdfc276656 100644
--- a/ICSharpCode.Decompiler/IL/Transforms/EarlyExpressionTransforms.cs
+++ b/ICSharpCode.Decompiler/IL/Transforms/EarlyExpressionTransforms.cs
@@ -213,9 +213,9 @@ bool TransformDecimalCtorToConstant(NewObj inst, out LdcDecimal result)
 				int lo, mid, hi, isNegative, scale;
 				if (args[0].MatchLdcI4(out lo) && args[1].MatchLdcI4(out mid) &&
 					args[2].MatchLdcI4(out hi) && args[3].MatchLdcI4(out isNegative) &&
-					args[4].MatchLdcI4(out scale) && scale <= 28)
+					args[4].MatchLdcI4(out scale) && unchecked((byte)scale) <= 28)
 				{
-					result = new LdcDecimal(new decimal(lo, mid, hi, isNegative != 0, (byte)scale));
+					result = new LdcDecimal(new decimal(lo, mid, hi, isNegative != 0, unchecked((byte)scale)));
 					return true;
 				}
 			}