diff --git a/scripts/perf/pm/collect-bmc-pm b/scripts/perf/pm/collect-bmc-pm
index 23321ed5e..54f544700 100755
--- a/scripts/perf/pm/collect-bmc-pm
+++ b/scripts/perf/pm/collect-bmc-pm
@@ -386,6 +386,7 @@ dump_readings() {
 		avg=$((total / ${#readings[@]}))
 
 		readings+=("Total: ${#readings[@]}")
+		sensor="${sensor//[[:space:]]/_}"
 		printf '%u\n' "$avg" > "$output_dir/${prefix:+${prefix}_}avg_${sensor}.bmc.pm.txt"
 		printf '%s\n' "${readings[@]}" > "$output_dir/${prefix:+${prefix}_}all_${sensor}.bmc.pm.txt"
 		printf 'Dumped avg to %s\n' "$output_dir/${prefix:+${prefix}_}avg_${sensor}.bmc.pm.txt" >&2