diff --git a/src/fpm_find/indexed_package_s.F90 b/src/fpm_find/indexed_package_s.F90
index ffc1b25..769e3ed 100644
--- a/src/fpm_find/indexed_package_s.F90
+++ b/src/fpm_find/indexed_package_s.F90
@@ -5,6 +5,7 @@
 #include "julienne-assert-macros.h"
 
 submodule(indexed_package_m) indexed_package_s
+  use julienne_m, only : call_julienne_assert_
   implicit none
 
 contains
@@ -235,4 +236,4 @@ pure function lower_case(string) result(lower_case_string)
 #endif
   end function
 
-end submodule indexed_package_s
\ No newline at end of file
+end submodule indexed_package_s