diff --git a/src/cpu/x87_ops.h b/src/cpu/x87_ops.h
index 1a729475c..b2b082107 100644
--- a/src/cpu/x87_ops.h
+++ b/src/cpu/x87_ops.h
@@ -55,7 +55,7 @@ typedef union
         uint64_t exponent:11;
         uint64_t negative:1;
     };
-} double_decompose;
+} double_decompose_t;
 
 #if defined(_MSC_VER) && !defined(__clang__)
 #    if defined i386 || defined __i386 || defined __i386__ || defined _X86_ || defined _M_IX86