diff --git a/llvm/test/Regression/Assembler/2005-01-03-FPConstantDisassembly.ll b/llvm/test/Regression/Assembler/2005-01-03-FPConstantDisassembly.ll
new file mode 100644
index 000000000000..bd0d389ff7c2
--- /dev/null
+++ b/llvm/test/Regression/Assembler/2005-01-03-FPConstantDisassembly.ll
@@ -0,0 +1,6 @@
+; RUN: llvm-as < %s | llvm-dis | grep '1.0'
+
+double %test() {
+        ret double 1.0   ;; This should not require hex notation
+}
+