diff --git a/src/research.h b/src/research.h
index d575286..466a68f 100644
--- a/src/research.h
+++ b/src/research.h
@@ -4,6 +4,6 @@
 bool research(void);		// detect clusters
 int eliminate_c(void);		// eliminate clusters
 int cascade(void);		// cascade ceiling tiles
-int clear(void);		// clear matched array;
+int clear_mat(void);		// clear matched array;
 
 #endif