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-rw-r--r--camlibs/sierra/sierra-desc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/camlibs/sierra/sierra-desc.h b/camlibs/sierra/sierra-desc.h
index 041dba32d..b7794564a 100644
--- a/camlibs/sierra/sierra-desc.h
+++ b/camlibs/sierra/sierra-desc.h
@@ -85,6 +85,7 @@ typedef struct {
float range[3]; /* GP_WIDGET_RANGE these are
min/max/stepping; if stepping is zero,
a stepping of one is used. */
+ CameraWidgetCallback callback; /* GP_WIDGET_BUTTON */
} u;
/*
* Range uses no name - the name is implicitly the value. XXX Move name