diff --git a/src/cats/debug/debug_vital_rates.h b/src/cats/debug/debug_vital_rates.h
index 442e19712f0d92a2fa61655e3ed38fd17f78df87..c5c1b4f05b1adf6964f106ae6897a23c68f943e4 100644
--- a/src/cats/debug/debug_vital_rates.h
+++ b/src/cats/debug/debug_vital_rates.h
@@ -27,6 +27,7 @@
 #include "configuration/configuration.h"
 
 void debug_vital_rates(struct cats_configuration *conf, const struct program_options *command_line_options);
-
+struct cats_environment *minimal_suitability_environment(void);
+struct cats_grid *minimal_grid(struct cats_configuration *conf, struct cats_environment *env);
 
 #endif //CATS_DEBUG_VITAL_RATES_H