diff --git a/conf/vai.config b/conf/vai.config
index 2cef179..4ba037e 100644
--- a/conf/vai.config
+++ b/conf/vai.config
@@ -8,7 +8,7 @@ params {
 }
 
 process {
-  beforeScript = 'alias singularity /varidata/research/software/singularity/singularity-ce-3.8.2/bin/singularity'
+  beforeScript = 'alias singularity=/varidata/research/software/singularity/singularity-ce-3.8.2/bin/singularity'
   executor = 'pbs'
   queue = { task.time <= 48.h ? 'shortq' : 'longq' }
   maxRetries = 2