diff --git a/tests/Makefile b/tests/Makefile
index 619bafe6..39c28ae7 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -30,7 +30,7 @@ all:
 .c.gcov:
 	awk '/START_COVERAGE/ { printit=1} (printit == 0) { print }' $< > $<.first.c
 	awk '  printit { print } /END_COVERAGE/ { printit=1}' $< > $<.end.c
-	$(CC) $(CPPFLAGS) -E -DNDEBUG -DWITHIN_COVERAGE $< |grep -v '^#' |awk ' /END_COVERAGE/ { printit=0} printit { print } /START_COVERAGE/ { printit=1 }' |perl -pi -e "s/;(?![\"'])/;\n/g ; s/}(?![\"'])/}\n/g ; s/{(?![\"'])/{\n/g" > $<.middle.c
+	$(CC) $(CPPFLAGS) -E -DNDEBUG -DWITHIN_COVERAGE $< |grep -v '^#' |awk ' /END_COVERAGE/ { printit=0} printit { print } /START_COVERAGE/ { printit=1 }' |perl -p -e "s/;(?![\"'])/;\n/g ; s/}(?![\"'])/}\n/g ; s/{(?![\"'])/{\n/g" > $<.middle.c
 	cat $<.first.c $<.middle.c $<.end.c > $<.c
 	$(CC) $(CPPFLAGS) $(LDFLAGS) -ftest-coverage -fprofile-arcs -g $<.c -o $<.exe
 	./$<.exe