diff --git a/avogadro/core/atomutilities.h b/avogadro/core/atomutilities.h
index 2170df97b1..64be896f19 100644
--- a/avogadro/core/atomutilities.h
+++ b/avogadro/core/atomutilities.h
@@ -8,8 +8,6 @@
 
 #include "avogadrocoreexport.h"
 
-#include "avogadrocoreexport.h"
-
 #include <avogadro/core/molecule.h>
 
 #include <vector>