1 files changed, 1 insertions, 1 deletions
diff --git a/dive.h b/dive.h
index 9cc55c964..abbf4a7ae 100644
--- a/dive.h
+++ b/dive.h
@@ -152,7 +152,7 @@ typedef struct
 } weightsystem_t;
 
 extern int get_pressure_units(unsigned int mb, const char **units);
-extern double get_depth_units(unsigned int mm, int *frac, const char **units);
+extern double get_depth_units(int mm, int *frac, const char **units);
 extern double get_volume_units(unsigned int ml, int *frac, const char **units);
 extern double get_temp_units(unsigned int mk, const char **units);
 extern double get_weight_units(unsigned int grams, int *frac, const char **units);