diff --git a/test/Transforms/ConstProp/2006-12-01-TruncBoolBug.ll b/test/Transforms/ConstProp/2006-12-01-TruncBoolBug.ll
new file mode 100644
index 00000000000..c7b2c6fa6d2
--- /dev/null
+++ b/test/Transforms/ConstProp/2006-12-01-TruncBoolBug.ll
@@ -0,0 +1,5 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'ret bool false'
+bool %test() {
+  %X = trunc uint 320 to bool
+  ret bool %X
+}