diff --git a/lib/test_hexdump.c b/lib/test_hexdump.c
index 626f580b4ff7b0c52fd3aeb7cffdf19429c3f457..5144899d3c6b8b235d33c8a988f3a413fa34aff8 100644
--- a/lib/test_hexdump.c
+++ b/lib/test_hexdump.c
@@ -99,7 +99,7 @@ static void __init test_hexdump_prepare_test(size_t len, int rowsize,
 		const char *q = *result++;
 		size_t amount = strlen(q);
 
-		strncpy(p, q, amount);
+		memcpy(p, q, amount);
 		p += amount;
 
 		*p++ = ' ';