diff --git a/exec.c b/exec.c
index 6384df2..046e967 100644
--- a/exec.c
+++ b/exec.c
@@ -1281,8 +1281,10 @@
 void cpu_abort(CPUState *env, const char *fmt, ...)
 {
     va_list ap;
+    va_list ap2;
 
     va_start(ap, fmt);
+    va_copy(ap2, ap);
     fprintf(stderr, "qemu: fatal: ");
     vfprintf(stderr, fmt, ap);
     fprintf(stderr, "\n");
@@ -1298,7 +1300,7 @@
 #endif
     if (logfile) {
         fprintf(logfile, "qemu: fatal: ");
-        vfprintf(logfile, fmt, ap);
+        vfprintf(logfile, fmt, ap2);
         fprintf(logfile, "\n");
 #ifdef TARGET_I386
         cpu_dump_state(env, logfile, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP);
@@ -1308,6 +1310,7 @@
         fflush(logfile);
         fclose(logfile);
     }
+    va_end(ap2);
     va_end(ap);
     abort();
 }