diff --git a/OpenMcdf/FatStream.cs b/OpenMcdf/FatStream.cs
index 81c6de1..6254c0b 100644
--- a/OpenMcdf/FatStream.cs
+++ b/OpenMcdf/FatStream.cs
@@ -139,7 +139,7 @@ public override long Seek(long offset, SeekOrigin origin)
                 break;
 
             default:
-                throw new ArgumentException(nameof(origin), "Invalid seek origin");
+                throw new ArgumentException("Invalid seek origin", nameof(origin));
         }
 
         return position;
diff --git a/OpenMcdf/MiniFatStream.cs b/OpenMcdf/MiniFatStream.cs
index ba40a29..21a86ea 100644
--- a/OpenMcdf/MiniFatStream.cs
+++ b/OpenMcdf/MiniFatStream.cs
@@ -129,7 +129,7 @@ public override long Seek(long offset, SeekOrigin origin)
                 break;
 
             default:
-                throw new ArgumentException(nameof(origin), "Invalid seek origin.");
+                throw new ArgumentException("Invalid seek origin.", nameof(origin));
         }
 
         return position;