diff --git a/src/common/bspf.hxx b/src/common/bspf.hxx
index d43080b7e..dc269f5cb 100644
--- a/src/common/bspf.hxx
+++ b/src/common/bspf.hxx
@@ -117,7 +117,7 @@ static const string EmptyString("");
 
 namespace BSPF
 {
-  static constexpr float PI_f = 3.141592653589793238462643383279502884F;
+  statix constexpr float PI_f = 3.141592653589793238462643383279502884F;
   static constexpr double PI_d = 3.141592653589793238462643383279502884;
 
   // CPU architecture type