diff --git a/scripts/php-config.in b/scripts/php-config.in
index 879299f9cf6..87c20089bb7 100644
--- a/scripts/php-config.in
+++ b/scripts/php-config.in
@@ -11,7 +11,7 @@ lib_dir="@orig_libdir@"
 includes="-I$include_dir -I$include_dir/main -I$include_dir/TSRM -I$include_dir/Zend -I$include_dir/ext -I$include_dir/ext/date/lib"
 ldflags="@PHP_LDFLAGS@"
 libs="@EXTRA_LIBS@"
-extension_dir='@EXTENSION_DIR@'
+extension_dir="@EXTENSION_DIR@"
 man_dir=`eval echo @mandir@`
 program_prefix="@program_prefix@"
 program_suffix="@program_suffix@"