diff --git a/libs/sensor/ISensorServer.cpp b/libs/sensor/ISensorServer.cpp
index f20668d..efbbf7d 100644
--- a/libs/sensor/ISensorServer.cpp
+++ b/libs/sensor/ISensorServer.cpp
@@ -63,7 +63,8 @@
         Vector<Sensor> v;
         uint32_t n = reply.readUint32();
         v.setCapacity(n);
-        while (n--) {
+        while (n) {
+            n--;
             reply.read(s);
             v.add(s);
         }
@@ -80,7 +81,8 @@
         Vector<Sensor> v;
         uint32_t n = reply.readUint32();
         v.setCapacity(n);
-        while (n--) {
+        while (n) {
+            n--;
             reply.read(s);
             v.add(s);
         }