diff --git a/src/sound/backend/i_sound.cpp b/src/sound/backend/i_sound.cpp
index 64116a288..650d237fc 100644
--- a/src/sound/backend/i_sound.cpp
+++ b/src/sound/backend/i_sound.cpp
@@ -370,7 +370,7 @@ SoundHandle SoundRenderer::LoadSoundVoc(uint8_t *sfxdata, int length)
 			switch (blocktype)
 			{
 			case 1: // Sound data
-				if (noextra && (codec == -1 || codec == sfxdata[i+1]))
+				if (/*noextra &*/ (codec == -1 || codec == sfxdata[i + 1])) // NAM contains a VOC where a valid data block follows an extra block.
 				{
 					frequency = 1000000/(256 - sfxdata[i]);
 					channels = 1;
@@ -382,6 +382,7 @@ SoundHandle SoundRenderer::LoadSoundVoc(uint8_t *sfxdata, int length)
 					else okay = false;
 					len += blocksize - 2;
 				}
+				else okay = false;
 				break;
 			case 2: // Sound data continuation
 				if (codec == -1)