1 files changed, 6 insertions, 1 deletions
diff --git a/dive.h b/dive.h
index c13cac0aa..0c2e5b721 100644
--- a/dive.h
+++ b/dive.h
@@ -17,6 +17,12 @@
 
 #ifdef __cplusplus
 extern "C" {
+#else
+#if __STDC_VERSION__ >= 199901L
+#include <stdbool.h>
+#else
+typedef int bool;
+#endif
 #endif
 
 #define O2_IN_AIR		209     // permille
@@ -32,7 +38,6 @@ extern "C" {
 #define SEAWATER_SALINITY	10300
 #define FRESHWATER_SALINITY	10000
 
-
 /*
  * Some silly typedefs to make our units very explicit.
  *