1 files changed, 1 insertions, 0 deletions
diff --git a/units.h b/units.h
index a8c0d7dbc..f3c02121a 100644
--- a/units.h
+++ b/units.h
@@ -26,6 +26,7 @@ extern "C" {
 #define SEAWATER_SALINITY 10300
 #define FRESHWATER_SALINITY 10000
 
+#include <stdint.h>
 /*
  * Some silly typedefs to make our units very explicit.
  *