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-rw-r--r--src/pattern_sim.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/pattern_sim.c b/src/pattern_sim.c
index bcbefdf5..603fc770 100644
--- a/src/pattern_sim.c
+++ b/src/pattern_sim.c
@@ -42,6 +42,7 @@ static void show_help(const char *s)
"pulses of X-rays from a free electron laser.\n"
"\n"
" -h, --help Display this help message.\n"
+"\n"
" -p, --pdb=<file> PDB file from which to get the unit cell.\n"
" (The actual Bragg intensities come from the\n"
" intensities file)\n"