diff --git a/analyze-clean.sh b/analyze-clean.sh
index ea373dc..35d01fd 100755
--- a/analyze-clean.sh
+++ b/analyze-clean.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-report_dir=scan-build-$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 6 | head -n 1)
+report_dir=scan-build-$(tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 6 | head -n 1)
 
 if make clean ; then
 	scan-build -o "$report_dir" make -j CC=clang