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-rw-r--r--Completion/User/_prcs2
1 files changed, 1 insertions, 1 deletions
diff --git a/Completion/User/_prcs b/Completion/User/_prcs
index 394fefbab..fc80cd392 100644
--- a/Completion/User/_prcs
+++ b/Completion/User/_prcs
@@ -136,7 +136,7 @@ else
       '(--new)-N[compare new files against empty files]' \
       "(-P)--exclude-project-file[don't diff the project file]" \
       "(--exclude-project-file)-P[don't diff the project file]" \
-      '--[introduce diff options]:*::diff options: _diff_options' \
+      '--[introduce diff options]:*::diff options: _diff_options ${PRCS_DIFF_COMMAND:-diff}' \
       ':project name:_prcs_projects' \
       '*:file or directory:_files'
     ;;