diff --git a/src/sounds.c b/src/sounds.c
index bb8c55633..4af86b79d 100644
--- a/src/sounds.c
+++ b/src/sounds.c
@@ -534,7 +534,7 @@ sfxinfo_t S_sfx[NUMSFX] =
   {"s3k81",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Burst"},
   {"s3k82",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Burst"},
   {"s3k83",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Collapsing"},
-  {"s3k84",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Powering up"},
+  {"s3k84",  false,  64,  8, -1, NULL, 0,        -1,  -1, LUMPERROR, "Powering up"}, // Lightning Shield Charge
   {"s3k85",  false,  64, 24, -1, NULL, 0,        -1,  -1, LUMPERROR, "Powering down"},
   {"s3k86",  false, 128,  8, -1, NULL, 0,        -1,  -1, LUMPERROR, "Alarm"},
   {"s3k87",  false,  64,  0, -1, NULL, 0,        -1,  -1, LUMPERROR, "Bounce"},