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-rw-r--r--src/diffraction.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/diffraction.h b/src/diffraction.h
index e2994a0b..1e08e116 100644
--- a/src/diffraction.h
+++ b/src/diffraction.h
@@ -20,6 +20,7 @@
#include "cell.h"
extern void get_diffraction(struct image *image);
-extern double water_intensity(struct threevec q, double en);
+extern double water_intensity(struct threevec q, double en,
+ double beam_r, double water_r);
#endif /* DIFFRACTION_H */