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-rw-r--r--libcrystfel/src/symmetry.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/libcrystfel/src/symmetry.h b/libcrystfel/src/symmetry.h
index b600bbc0..ad077603 100644
--- a/libcrystfel/src/symmetry.h
+++ b/libcrystfel/src/symmetry.h
@@ -33,6 +33,9 @@
#include <config.h>
#endif
+
+#include "integer_matrix.h"
+
/**
* SymOpList
*
@@ -76,4 +79,6 @@ extern int is_centrosymmetric(const SymOpList *s);
extern const char *symmetry_name(const SymOpList *ops);
extern void describe_symmetry(const SymOpList *s);
+extern void add_op_intmat(SymOpList *s, const IntegerMatrix *m);
+
#endif /* SYMMETRY_H */