diff --git a/src/mesh/RadioInterface.cpp b/src/mesh/RadioInterface.cpp
index c66f0e1d3..c6d5e8a78 100644
--- a/src/mesh/RadioInterface.cpp
+++ b/src/mesh/RadioInterface.cpp
@@ -328,9 +328,9 @@ int RadioInterface::notifyDeepSleepCb(void *unused)
  * djb2 by Dan Bernstein.
  * http://www.cse.yorku.ca/~oz/hash.html
  */
-unsigned long hash(const char *str)
+uint32_t hash(const char *str)
 {
-    unsigned long hash = 5381;
+    uint32_t hash = 5381;
     int c;
 
     while ((c = *str++) != 0)
@@ -548,4 +548,4 @@ size_t RadioInterface::beginSending(meshtastic_MeshPacket *p)
 
     sendingPacket = p;
     return p->encrypted.size + sizeof(PacketHeader);
-}
+}
\ No newline at end of file