diff --git a/vl.c b/vl.c
index 13b07c8..c3894b8 100644
--- a/vl.c
+++ b/vl.c
@@ -532,6 +532,15 @@
 	return val;
 }
 
+#elif defined(__s390__)
+
+int64_t cpu_get_real_ticks(void)
+{
+    int64_t val;
+    asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc");
+    return val;
+}
+
 #else
 #error unsupported CPU
 #endif