diff --git a/src/ppm_fmm_init.f b/src/ppm_fmm_init.f
index 80237a52c84438b4909ff525bed1d604eb0e03b7..f6e52923720aee460448c8b55558d2830baab71e 100644
--- a/src/ppm_fmm_init.f
+++ b/src/ppm_fmm_init.f
@@ -136,9 +136,9 @@
       USE ppm_module_error
       USE ppm_module_map
       USE ppm_module_topo_box2subs
-      USE ppm_module_topo      
+      USE ppm_module_topo
       USE ppm_module_substart
-      USE ppm_module_substop 
+      USE ppm_module_substop
       USE ppm_module_write
 
       IMPLICIT NONE