diff --git a/src/ecwam/ecwam_loki_gpu.config b/src/ecwam/ecwam_loki_gpu.config
index 986561f0..e6378adb 100644
--- a/src/ecwam/ecwam_loki_gpu.config
+++ b/src/ecwam/ecwam_loki_gpu.config
@@ -71,6 +71,7 @@ block = ['ec_parkind', 'parkind_wave', 'yowdrvtype']
   horizontal = "%dimensions.horizontal%"
   directive = "openacc"
   trim_vector_sections = true
+  block_dim = "%dimensions.block_dim%"
 
 [transformations.SCCStackPipeline]
   module = "loki.transformations.single_column"