diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp
index 429b61b..6b8430f 100644
--- a/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/lib/Transforms/Scalar/JumpThreading.cpp
@@ -670,6 +670,8 @@
   } else if (SwitchInst *SI = dyn_cast<SwitchInst>(Terminator)) {
     Condition = SI->getCondition();
   } else if (IndirectBrInst *IB = dyn_cast<IndirectBrInst>(Terminator)) {
+    // Can't thread indirect branch with no successors.
+    if (IB->getNumSuccessors() == 0) return false;
     Condition = IB->getAddress()->stripPointerCasts();
     Preference = WantBlockAddress;
   } else {
diff --git a/test/Transforms/JumpThreading/2012-07-19-NoSuccessorIndirectBr.ll b/test/Transforms/JumpThreading/2012-07-19-NoSuccessorIndirectBr.ll
new file mode 100644
index 0000000..1c2c0c7
--- /dev/null
+++ b/test/Transforms/JumpThreading/2012-07-19-NoSuccessorIndirectBr.ll
@@ -0,0 +1,8 @@
+; RUN: opt < %s -jump-threading
+; PR 13405
+; Just check that it doesn't crash / assert
+
+define i32 @f() nounwind {
+entry:
+  indirectbr i8* undef, []
+}