diff --git a/src/hydro.h b/src/hydro.h
index f3a1bcdc85a944eb6f88573e42d153f491ea0310..aacbb6ac1d16b38133ee573ee2b7ad95918fc9e5 100644
--- a/src/hydro.h
+++ b/src/hydro.h
@@ -38,6 +38,4 @@
 #error "Invalid choice of SPH variant"
 #endif
 
-void hydro_print_scheme();
-
 #endif /* SWIFT_HYDRO_H */