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-rw-r--r--src/diffraction.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/diffraction.h b/src/diffraction.h
index 112818bc..e2994a0b 100644
--- a/src/diffraction.h
+++ b/src/diffraction.h
@@ -20,5 +20,6 @@
#include "cell.h"
extern void get_diffraction(struct image *image);
+extern double water_intensity(struct threevec q, double en);
#endif /* DIFFRACTION_H */