diff --git a/dive.h b/dive.h
index 4f9b29509..dab4409da 100644
--- a/dive.h
+++ b/dive.h
@@ -367,7 +367,7 @@ struct divecomputer {
 };
 
 #define MAX_CYLINDERS (8)
-#define MAX_WEIGHTSYSTEMS (4)
+#define MAX_WEIGHTSYSTEMS (6)
 #define W_IDX_PRIMARY 0
 #define W_IDX_SECONDARY 1