diff -Naur a/configure b/configure
--- a/configure	2023-09-22 16:14:13.000000000 +0000
+++ b/configure	2023-12-20 02:38:47.154391881 +0000
@@ -17206,7 +17206,7 @@
 
 fi
 
-if test "x$CUPS_GHOSTSCRIPT" == "x" -a "x$CUPS_PDFTOPS" == "x"
+if test "x$CUPS_GHOSTSCRIPT" = "x" -a "x$CUPS_PDFTOPS" = "x"
 then :
 
 	enable_universal_cups_filter=no
diff -Naur a/configure.ac b/configure.ac
--- a/configure.ac	2023-09-22 16:14:03.000000000 +0000
+++ b/configure.ac	2023-12-20 02:38:05.316038698 +0000
@@ -349,7 +349,7 @@
 	[enable_universal_cups_filter="$enableval"],
 	[enable_universal_cups_filter=yes]
 )
-AS_IF([test "x$CUPS_GHOSTSCRIPT" == "x" -a "x$CUPS_PDFTOPS" == "x"], [
+AS_IF([test "x$CUPS_GHOSTSCRIPT" = "x" -a "x$CUPS_PDFTOPS" = "x"], [
 	enable_universal_cups_filter=no
 ])
 AM_CONDITIONAL([ENABLE_UNIVERSAL_CUPS_FILTER],