diff --git a/apps/powertrace/powertrace.c b/apps/powertrace/powertrace.c
index 81b469bbf..131eb1deb 100644
--- a/apps/powertrace/powertrace.c
+++ b/apps/powertrace/powertrace.c
@@ -48,15 +48,15 @@
 
 struct powertrace_sniff_stats {
   struct powertrace_sniff_stats *next;
-  uint32_t num_input, num_output;
-  uint32_t input_txtime, input_rxtime;
-  uint32_t output_txtime, output_rxtime;
+  unsigned long num_input, num_output;
+  unsigned long input_txtime, input_rxtime;
+  unsigned long output_txtime, output_rxtime;
 #if NETSTACK_CONF_WITH_IPV6
   uint16_t proto; /* includes proto + possibly flags */
 #endif
   uint16_t channel;
-  uint32_t last_input_txtime, last_input_rxtime;
-  uint32_t last_output_txtime, last_output_rxtime;
+  unsigned long last_input_txtime, last_input_rxtime;
+  unsigned long last_output_txtime, last_output_rxtime;
 };
 
 #define INPUT  1
@@ -72,17 +72,17 @@ PROCESS(powertrace_process, "Periodic power output");
 void
 powertrace_print(char *str)
 {
-  static uint32_t last_cpu, last_lpm, last_transmit, last_listen;
-  static uint32_t last_idle_transmit, last_idle_listen;
+  static unsigned long last_cpu, last_lpm, last_transmit, last_listen;
+  static unsigned long last_idle_transmit, last_idle_listen;
 
-  uint32_t cpu, lpm, transmit, listen;
-  uint32_t all_cpu, all_lpm, all_transmit, all_listen;
-  uint32_t idle_transmit, idle_listen;
-  uint32_t all_idle_transmit, all_idle_listen;
+  unsigned long cpu, lpm, transmit, listen;
+  unsigned long all_cpu, all_lpm, all_transmit, all_listen;
+  unsigned long idle_transmit, idle_listen;
+  unsigned long all_idle_transmit, all_idle_listen;
 
-  static uint32_t seqno;
+  static unsigned long seqno;
 
-  uint32_t time, all_time, radio, all_radio;
+  unsigned long time, all_time, radio, all_radio;
   
   struct powertrace_sniff_stats *s;