diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 07e048681783effe4d789c4f6b46afa961ab489c..aebd3df8a9768a8b4c6f18099cea49dc9cd99ff7 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -172,10 +172,10 @@ int board_init(void)
 	if (current_el() != 3) {
 		static char version[ZYNQMP_VERSION_SIZE];
 
-		strncat(version, "xczu", ZYNQMP_VERSION_SIZE);
+		strncat(version, "xczu", 4);
 		zynqmppl.name = strncat(version,
 					zynqmp_get_silicon_idcode_name(),
-					ZYNQMP_VERSION_SIZE);
+					ZYNQMP_VERSION_SIZE - 5);
 		printf("Chip ID:\t%s\n", zynqmppl.name);
 		fpga_init();
 		fpga_add(fpga_xilinx, &zynqmppl);