diff --git a/llvm/lib/Target/X86/X86CallingConv.td b/llvm/lib/Target/X86/X86CallingConv.td
index f63144fef85a..cd772cc50bf4 100644
--- a/llvm/lib/Target/X86/X86CallingConv.td
+++ b/llvm/lib/Target/X86/X86CallingConv.td
@@ -181,9 +181,8 @@ def CC_X86_32_Common : CallingConv<[
   // Doubles get 8-byte slots that are 4-byte aligned.
   CCIfType<[f64], CCAssignToStack<8, 4>>,
 
-  // Long doubles get slots whose size and alignment depends on the
-  // subtarget.
-  CCIfType<[f80], CCAssignToStack<0, 0>>,
+  // Long doubles get slots whose size depends on the subtarget.
+  CCIfType<[f80], CCAssignToStack<0, 4>>,
 
   // The first 4 vector arguments are passed in XMM registers.
   CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],