diff --git a/lib/maven.defs b/lib/maven.defs
index 67dad4ea76..d517de725f 100644
--- a/lib/maven.defs
+++ b/lib/maven.defs
@@ -48,6 +48,12 @@ def maven_jar(
     raise NameError('expected id="groupId:artifactId:version"')
   group, artifact, version = parts
 
+  # SNAPSHOT artifacts are handled differently on Google storage bucket:
+  # 'SNAPSHOT' is discarded from the directory name. However on other
+  # Maven repositories, most notable local repository located in
+  # ~/.m2/repository (and is supported through MAVEN_LOCAL repository)
+  # it must be preserved, otherwise the artifact wouldn't be found.
+  # Atm the SNAPSHOT part is only discarded for Google storage bucket.
   if 'SNAPSHOT' in version and repository.startswith(GERRIT):
     file_version = version.replace('-SNAPSHOT', '')
     version = version.split('-SNAPSHOT')[0] + '-SNAPSHOT'