diff --git a/armsrc/Standalone/lf_proxbrute.c b/armsrc/Standalone/lf_proxbrute.c
index d7c1ae560..83b16a10b 100644
--- a/armsrc/Standalone/lf_proxbrute.c
+++ b/armsrc/Standalone/lf_proxbrute.c
@@ -16,7 +16,7 @@ void RunMod() {
 	StandAloneMode();
 	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 
-	int high[OPTS], low[OPTS];
+	uint32_t high[OPTS], low[OPTS];
 	int selected = 0;
 	int playing = 0;
 	int cardRead = 0;
diff --git a/armsrc/Standalone/lf_samyrun.c b/armsrc/Standalone/lf_samyrun.c
index 20aae9054..0610409f4 100644
--- a/armsrc/Standalone/lf_samyrun.c
+++ b/armsrc/Standalone/lf_samyrun.c
@@ -15,7 +15,7 @@ void RunMod() {
 	StandAloneMode();
 	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 
-	int high[OPTS], low[OPTS];
+	uint32_t high[OPTS], low[OPTS];
 	int selected = 0;
 	int playing = 0;
 	int cardRead = 0;