diff --git a/ebtree/eb32tree.h b/ebtree/eb32tree.h
index 8c1a470..3896fb8 100644
--- a/ebtree/eb32tree.h
+++ b/ebtree/eb32tree.h
@@ -41,8 +41,9 @@
  */
 struct eb32_node {
 	struct eb_node node; /* the tree node, must be at the beginning */
+	MAYBE_ALIGN(sizeof(u32));
 	u32 key;
-};
+} ALIGNED(sizeof(void*));
 
 /*
  * Exported functions and macros.