diff --git a/block-cache/io_engine.h b/block-cache/io_engine.h
index 0e13957..5998ffb 100644
--- a/block-cache/io_engine.h
+++ b/block-cache/io_engine.h
@@ -17,6 +17,10 @@
 
 //----------------------------------------------------------------
 
+// Musl defines
+#ifdef PAGE_SIZE
+#undef PAGE_SIZE
+#endif
 namespace bcache {
 	using sector_t = uint64_t;