diff --git a/src/common/bspf.hxx b/src/common/bspf.hxx
index a60ce78cb..56e0f28da 100644
--- a/src/common/bspf.hxx
+++ b/src/common/bspf.hxx
@@ -87,6 +87,8 @@ using BytePtr = std::unique_ptr<uInt8[]>;
 
 static const string EmptyString("");
 
+#undef PAGE_SIZE
+
 namespace BSPF
 {
   // Defines to help with path handling