diff --git a/blocks/blocks.csproj b/blocks/blocks.csproj
index 22f41d00..a0bae6cc 100644
--- a/blocks/blocks.csproj
+++ b/blocks/blocks.csproj
@@ -48,6 +48,7 @@
     <Compile Include="cflow\ConstantsFolder.cs" />
     <Compile Include="cflow\DeadCodeRemover.cs" />
     <Compile Include="cflow\DeadStoreRemover.cs" />
+    <Compile Include="cflow\DupBlockDeobfuscator.cs" />
     <Compile Include="cflow\IBlocksDeobfuscator.cs" />
     <Compile Include="cflow\ICflowDeobfuscator.cs" />
     <Compile Include="cflow\InstructionEmulator.cs" />
diff --git a/blocks/cflow/BlocksCflowDeobfuscator.cs b/blocks/cflow/BlocksCflowDeobfuscator.cs
index 9a3f42ba..7e297293 100644
--- a/blocks/cflow/BlocksCflowDeobfuscator.cs
+++ b/blocks/cflow/BlocksCflowDeobfuscator.cs
@@ -43,6 +43,7 @@ namespace de4dot.blocks.cflow {
 			ourBlocksDeobfuscators.Add(new DeadCodeRemover { ExecuteOnNoChange = false });
 			ourBlocksDeobfuscators.Add(new ConstantsFolder { ExecuteOnNoChange = true });
 			ourBlocksDeobfuscators.Add(new StLdlocFixer { ExecuteOnNoChange = true });
+			ourBlocksDeobfuscators.Add(new DupBlockCflowDeobfuscator { ExecuteOnNoChange = true });
 		}
 
 		public void add(IEnumerable<IBlocksDeobfuscator> blocksDeobfuscators) {
diff --git a/blocks/cflow/DupBlockDeobfuscator.cs b/blocks/cflow/DupBlockDeobfuscator.cs
new file mode 100644
index 00000000..bb841b14
--- /dev/null
+++ b/blocks/cflow/DupBlockDeobfuscator.cs
@@ -0,0 +1,49 @@
+/*
+    Copyright (C) 2011-2012 de4dot@gmail.com
+
+    This file is part of de4dot.
+
+    de4dot is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    de4dot is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with de4dot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+using System;
+using System.Collections.Generic;
+using dnlib.DotNet.Emit;
+
+namespace de4dot.blocks.cflow {
+	// If a block is just a dup followed by a bcc, try to append the block
+	// to all its sources. Will fix some SA assemblies.
+	class DupBlockCflowDeobfuscator : BlockDeobfuscator {
+		protected override bool deobfuscate(Block block) {
+			if (block.Instructions.Count != 2)
+				return false;
+			if (block.Instructions[0].OpCode.Code != Code.Dup)
+				return false;
+			if (!block.LastInstr.isConditionalBranch() && block.LastInstr.OpCode.Code != Code.Switch)
+				return false;
+
+			bool modified = false;
+			foreach (var source in new List<Block>(block.Sources)) {
+				if (source.getOnlyTarget() != block)
+					continue;
+				if (!source.canAppend(block))
+					continue;
+
+				source.append(block);
+				modified = true;
+			}
+			return modified;
+		}
+	}
+}