diff --git a/CanlabCore/GLM_Batch_tools/canlab_glm_subject_levels.m b/CanlabCore/GLM_Batch_tools/canlab_glm_subject_levels.m
index 47e517f7..be17d7ba 100644
--- a/CanlabCore/GLM_Batch_tools/canlab_glm_subject_levels.m
+++ b/CanlabCore/GLM_Batch_tools/canlab_glm_subject_levels.m
@@ -404,6 +404,8 @@ function canlab_glm_subject_levels(dsgnarg, varargin)
 
 % make working directory
 wd = regexprep(diaryname,'\.log$','');
+% add uuid to avoid collisions when parallelizing
+wd = fullfile(wd, char(java.util.UUID.randomUUID));
 mkdir(wd)