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-rw-r--r--src/core/ao.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/core/ao.h b/src/core/ao.h
index 200d4bc4..e559e876 100644
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -272,11 +272,13 @@ ao_temp_to_dC(int16_t temp) __reentrant;
* Convert between pressure in Pa and altitude in meters
*/
-int32_t
+#include <ao_data.h>
+
+alt_t
ao_pa_to_altitude(int32_t pa);
int32_t
-ao_altitude_to_pa(int32_t alt);
+ao_altitude_to_pa(alt_t alt);
#if HAS_DBG
#include <ao_dbg.h>