diff --git a/cpu-exec.c b/cpu-exec.c
index aef66f290..a9fa608cf 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -217,6 +217,7 @@ int cpu_exec(CPUState *env)
 #elif defined(TARGET_ARM)
 #elif defined(TARGET_UNICORE32)
 #elif defined(TARGET_PPC)
+    env->reserve_addr = -1;
 #elif defined(TARGET_LM32)
 #elif defined(TARGET_MICROBLAZE)
 #elif defined(TARGET_MIPS)