diff --git a/clang/test/Lexer/number.c b/clang/test/Lexer/number.c
new file mode 100644
index 000000000000..4e12cc7edce3
--- /dev/null
+++ b/clang/test/Lexer/number.c
@@ -0,0 +1,4 @@
+// RUN: clang %s -fsyntax-only
+
+float X = 1.17549435e-38F;
+