diff --git a/test/00/t0052a.sh b/test/00/t0052a.sh
index 4ccfd362..1aef53ca 100755
--- a/test/00/t0052a.sh
+++ b/test/00/t0052a.sh
@@ -72,7 +72,7 @@ if test $? -ne 0; then fail; fi
 
 # Test for block sizes > 1 (default)
 srec_cat test.in -o test.out -vhdl 1 --address-length=4 \
-	 --output-block-size=2
+    --output-block-size=2
 if test $? -ne 0; then fail; fi
 
 diff test.ok test.out