diff --git a/PARAM_DEF/ulys_swi_Cn.xml b/PARAM_DEF/ulys_swi_Cn.xml
index fa308f4..fbace9d 100644
--- a/PARAM_DEF/ulys_swi_Cn.xml
+++ b/PARAM_DEF/ulys_swi_Cn.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="C_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_C_density * greater_than(1000000,$ulys_swi_ion_C_density)</process><output/></param>
diff --git a/PARAM_DEF/ulys_swi_Fen.xml b/PARAM_DEF/ulys_swi_Fen.xml
index 90dd593..ebdc499 100644
--- a/PARAM_DEF/ulys_swi_Fen.xml
+++ b/PARAM_DEF/ulys_swi_Fen.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="Fe_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_Fe_density * greater_than(1000000,$ulys_swi_ion_Fe_density)</process><output/></param>
diff --git a/PARAM_DEF/ulys_swi_Hen.xml b/PARAM_DEF/ulys_swi_Hen.xml
index ff3fda9..a3c22f6 100644
--- a/PARAM_DEF/ulys_swi_Hen.xml
+++ b/PARAM_DEF/ulys_swi_Hen.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="He_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_He_density * greater_than(1000000,$ulys_swi_ion_He_density)</process><output/></param>
diff --git a/PARAM_DEF/ulys_swi_Mgn.xml b/PARAM_DEF/ulys_swi_Mgn.xml
index e846785..0aea002 100644
--- a/PARAM_DEF/ulys_swi_Mgn.xml
+++ b/PARAM_DEF/ulys_swi_Mgn.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="Mg_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_Mg_density * greater_than(1000000,$ulys_swi_ion_Mg_density)</process><output/></param>
diff --git a/PARAM_DEF/ulys_swi_On.xml b/PARAM_DEF/ulys_swi_On.xml
index f5a25b6..24da48a 100644
--- a/PARAM_DEF/ulys_swi_On.xml
+++ b/PARAM_DEF/ulys_swi_On.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="O_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_O_density * greater_than(1000000,$ulys_swi_ion_O_density)</process><output/></param>
diff --git a/PARAM_DEF/ulys_swi_Sin.xml b/PARAM_DEF/ulys_swi_Sin.xml
index 8fc3ab9..72a42d5 100644
--- a/PARAM_DEF/ulys_swi_Sin.xml
+++ b/PARAM_DEF/ulys_swi_Sin.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="Si_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_Si_density * greater_than(1000000,$ulys_swi_ion_Si_density)</process><output/></param>
diff --git a/PARAM_DEF/ulys_swi_Sn.xml b/PARAM_DEF/ulys_swi_Sn.xml
index 26b05f3..770c371 100644
--- a/PARAM_DEF/ulys_swi_Sn.xml
+++ b/PARAM_DEF/ulys_swi_Sn.xml
@@ -5,4 +5,4 @@
 		    <baseParam name="S_density"/>
 </vi>
 </get>
-<process/><output/></param>
+<process>$ulys_swi_ion_S_density * greater_than(1000000,$ulys_swi_ion_S_density)</process><output/></param>
--
libgit2 0.21.2