diff --git a/hw/acpi.c b/hw/acpi.c
index 069e05fc7..8071e7beb 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -161,7 +161,7 @@ int acpi_table_add(const char *t)
 
         /* off < length is necessary because file size can be changed
            under our foot */
-        while(s.st_size && off < length); {
+        while(s.st_size && off < length) {
             int r;
             r = read(fd, p + off, s.st_size);
             if (r > 0) {