diff --git a/Ccore/ccore.geo b/Ccore/ccore.geo
index 178d01cc338d92872185377a90f127fbda0d4a7e..80e8bd7d6ab5c1c7f9b76056b2b294ccbfeb9325 100644
--- a/Ccore/ccore.geo
+++ b/Ccore/ccore.geo
@@ -102,4 +102,4 @@ Physical Surface("COILN", 4) = 4;
 
 Physical Line("DIR", 11) = {1 ... 4};
 
-Include "OnelabOptimize.geo";
+Include "onelab_optimize.geo";
diff --git a/Ccore/ccore.py b/Ccore/ccore.py
index ea9aef342310c3a87686da8e0d6774564b7838d4..babae4ce620729933fd7d49029a1757b23c9cb68 100644
--- a/Ccore/ccore.py
+++ b/Ccore/ccore.py
@@ -1,3 +1,3 @@
 
-import OnelabOptimize
-OnelabOptimize.minimize('ccore')
+import onelab_optimize
+onelab_optimize.minimize('ccore')