diff --git a/src/physics/water_simple.f90 b/src/physics/water_simple.f90
index 29bc15f7..c36fe41c 100644
--- a/src/physics/water_simple.f90
+++ b/src/physics/water_simple.f90
@@ -6,7 +6,7 @@
 !!
 !!----------------------------------------------------------
 module module_water_simple
-    use data_structures,
+    use data_structures
     use options_interface,   only : options_t
     use icar_constants
     implicit none