diff --git a/Tools/generate_listener.py b/Tools/generate_listener.py
index e52d3cd26f..5cfe4a6281 100755
--- a/Tools/generate_listener.py
+++ b/Tools/generate_listener.py
@@ -91,6 +91,8 @@ print """
 #include <uORB/uORB.h>
 #include <string.h>
 #include <stdint.h>
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
 """
 for m in messages:
 	print "#include <uORB/topics/%s.h>" % m
@@ -135,7 +137,7 @@ for index,m in enumerate(messages[1:]):
 			print "\t\t\t}"
 			print "\t\t\tprintf(\"\\n\");"
 		elif item[0] == "uint64":
-			print "\t\t\tprintf(\"%s: %%lu\\n \",container.%s);" % (item[1], item[1])
+			print "\t\t\tprintf(\"%s: %%\" PRIu64 \"\\n \",container.%s);" % (item[1], item[1])
 		elif item[0] == "uint8":
 			print "\t\t\tprintf(\"%s: %%u\\n \",container.%s);" % (item[1], item[1])
 		elif item[0] == "bool":
diff --git a/src/platforms/posix/drivers/airspeedsim/airspeedsim.cpp b/src/platforms/posix/drivers/airspeedsim/airspeedsim.cpp
index ea9d92025e..5c2de4e3ce 100644
--- a/src/platforms/posix/drivers/airspeedsim/airspeedsim.cpp
+++ b/src/platforms/posix/drivers/airspeedsim/airspeedsim.cpp
@@ -211,7 +211,7 @@ Airspeed::ioctl(device::file_t *filp, int cmd, unsigned long arg)
 					bool want_start = (_measure_ticks == 0);
 
 					/* convert hz to tick interval via microseconds */
-					unsigned ticks = USEC2TICK(1000000 / arg);
+					long ticks = USEC2TICK(1000000 / arg);
 
 					/* check against maximum rate */
 					if (ticks < USEC2TICK(_conversion_interval))