diff --git a/zendalloc_gofuzz.go b/zendalloc_gofuzz.go
new file mode 100644
index 0000000000..e9267bcb97
--- /dev/null
+++ b/zendalloc_gofuzz.go
@@ -0,0 +1,10 @@
+//go:build gofuzz
+
+package frankenphp
+
+import "os"
+
+func init() {
+	// Zend's own arena allocator hides bugs from the sanitizers OSS-Fuzz builds with.
+	os.Setenv("USE_ZEND_ALLOC", "0")
+}