diff --git a/src/SPC/builder/macos/MacOSBuilder.php b/src/SPC/builder/macos/MacOSBuilder.php
index aa40f188..768567c8 100644
--- a/src/SPC/builder/macos/MacOSBuilder.php
+++ b/src/SPC/builder/macos/MacOSBuilder.php
@@ -98,7 +98,8 @@ class MacOSBuilder extends UnixBuilderBase
         $this->emitPatchPoint('before-php-configure');
         SourcePatcher::patchBeforeConfigure($this);
 
-        $json_74 = $this->getPHPVersionID() < 80000 ? '--enable-json ' : '';
+        $phpVersionID = $this->getPHPVersionID();
+        $json_74 = $phpVersionID < 80000 ? '--enable-json ' : '';
         $zts = $this->getOption('enable-zts', false) ? '--enable-zts --disable-zend-signals ' : '';
 
         $opcache_jit = !$this->getOption('disable-opcache-jit', false);