diff --git a/epan/tvbuff_lz77.c b/epan/tvbuff_lz77.c
index 6a1d0e3a6e..2cbfe5a7b0 100644
--- a/epan/tvbuff_lz77.c
+++ b/epan/tvbuff_lz77.c
@@ -28,7 +28,7 @@ static gboolean do_uncompress(tvbuff_t *tvb, int offset, int in_size,
 	if (!tvb)
 		return FALSE;
 
-	if (in_size > MAX_INPUT_SIZE)
+	if (!in_size || in_size > MAX_INPUT_SIZE)
 		return FALSE;
 
 	while (1) {
diff --git a/epan/tvbuff_lz77huff.c b/epan/tvbuff_lz77huff.c
index 86879bbb17..377fbcfb96 100644
--- a/epan/tvbuff_lz77huff.c
+++ b/epan/tvbuff_lz77huff.c
@@ -289,7 +289,7 @@ static gboolean do_uncompress(struct input *input,
 	if (!input->tvb)
 		return FALSE;
 
-	if (input->size > MAX_INPUT_SIZE)
+	if (!input->size || input->size > MAX_INPUT_SIZE)
 		return FALSE;
 
 	rc = PrefixCodeTreeRebuild(&tree, input);
diff --git a/epan/tvbuff_lznt1.c b/epan/tvbuff_lznt1.c
index 7b1a5b64ac..9afb8d7487 100644
--- a/epan/tvbuff_lznt1.c
+++ b/epan/tvbuff_lznt1.c
@@ -82,7 +82,7 @@ do_uncompress(tvbuff_t *tvb, int offset, int in_size, wmem_array_t *obuf)
 	if (!tvb)
 		return FALSE;
 
-	if (in_size > MAX_INPUT_SIZE)
+	if (!in_size || in_size > MAX_INPUT_SIZE)
 		return FALSE;
 
 	while (in_off < in_size) {