diff --git a/lib/bsp/standalone/src/cortexa53/xil_printf.c b/lib/bsp/standalone/src/cortexa53/xil_printf.c
old mode 100644
new mode 100755
index 8700d9dc..39e13e82
--- a/lib/bsp/standalone/src/cortexa53/xil_printf.c
+++ b/lib/bsp/standalone/src/cortexa53/xil_printf.c
@@ -93,7 +93,7 @@ static void outnum( const s32 n, const s32 base, params_t *par)
 	s32 i;
     char8 outbuf[32];
     const char8 digits[] = "0123456789ABCDEF";
-    s32 num;
+    u32 num;
     for(i = 0; i<32; i++) {
 	outbuf[i] = '0';
     }
diff --git a/lib/bsp/standalone/src/cortexa9/xil_printf.c b/lib/bsp/standalone/src/cortexa9/xil_printf.c
index bfd25997..5c1b467f 100644
--- a/lib/bsp/standalone/src/cortexa9/xil_printf.c
+++ b/lib/bsp/standalone/src/cortexa9/xil_printf.c
@@ -98,7 +98,7 @@ static void outnum( const s32 n, const s32 base, struct params_s *par)
 	s32 i;
     char8 outbuf[32];
     const char8 digits[] = "0123456789ABCDEF";
-    s32 num;
+    u32 num;
     for(i = 0; i<32; i++) {
 	outbuf[i] = '0';
     }
diff --git a/lib/bsp/standalone/src/cortexr5/xil_printf.c b/lib/bsp/standalone/src/cortexr5/xil_printf.c
index bfd25997..5c1b467f 100644
--- a/lib/bsp/standalone/src/cortexr5/xil_printf.c
+++ b/lib/bsp/standalone/src/cortexr5/xil_printf.c
@@ -98,7 +98,7 @@ static void outnum( const s32 n, const s32 base, struct params_s *par)
 	s32 i;
     char8 outbuf[32];
     const char8 digits[] = "0123456789ABCDEF";
-    s32 num;
+    u32 num;
     for(i = 0; i<32; i++) {
 	outbuf[i] = '0';
     }