diff -U5 -r synfig-1.5.1.old/configure.ac synfig-1.5.1/configure.ac
--- synfig-1.5.1.old/configure.ac	2022-11-24 10:38:52.696511899 +0100
+++ synfig-1.5.1/configure.ac	2022-11-24 10:39:14.000290334 +0100
@@ -256,12 +256,12 @@
 )
 
 AS_IF([test "x$with_harfbuzz" != xno],
 	[
 		AS_IF([test "x$with_freetype" != xyes],
-			AC_MSG_FAILURE(
-				[--with-harfbuzz was given, but it depends on --with-freetype])
+			[AC_MSG_FAILURE(
+				[--with-harfbuzz was given, but it depends on --with-freetype])]
 		)
 	]
 )
 
 AS_IF([test "x$with_harfbuzz" != xno],