diff --git a/src/sphinx.cpp b/src/sphinx.cpp
index 60af10a73..83fe91d72 100644
--- a/src/sphinx.cpp
+++ b/src/sphinx.cpp
@@ -57,6 +57,9 @@
 #endif
 #endif
 
+// PAGE_SIZE may be in <limits.h>
+#undef PAGE_SIZE
+
 #if USE_LIBICONV
 #include "iconv.h"
 #endif