diff --git a/wiretap/netmon.c b/wiretap/netmon.c
index f48c564ff9..1c54eb3e15 100644
--- a/wiretap/netmon.c
+++ b/wiretap/netmon.c
@@ -48,12 +48,12 @@
 
 /* Magic number in Network Monitor 1.x files. */
 static const char netmon_1_x_magic[MAGIC_SIZE] = {
-	"RTSS"
+	'R', 'T', 'S', 'S'
 };
 
 /* Magic number in Network Monitor 2.x files. */
 static const char netmon_2_x_magic[MAGIC_SIZE] = {
-	"GMBU"
+	'G', 'M', 'B', 'U'
 };
 
 /* Network Monitor file header (minus magic number). */