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[ginac.git] / ginac / add.h

diff --git a/ginac/add.h b/ginac/add.h
index 783830345b682f4d18ee7bcd6741fc6a77e4104e..1b9651977030d2f719d4ae17ff89fdaf1caa7341 100644 (file)
--- a/ginac/add.h
+++ b/ginac/add.h
@@ -22,6 +22,8 @@
 #ifndef __GINAC_ADD_H__
 #define __GINAC_ADD_H__
 
+#include <ginac/expairseq.h>
+
 /** Sum of expressions. */
 class add : public expairseq
 {
@@ -106,4 +108,3 @@ extern type_info const & typeid_add;
 #define ex_to_add(X) static_cast<add const &>(*(X).bp)
 
 #endif // ndef __GINAC_ADD_H__
-