diff --git a/src/pulsecore/pstream.c b/src/pulsecore/pstream.c
index dbee77634..897e4295f 100644
--- a/src/pulsecore/pstream.c
+++ b/src/pulsecore/pstream.c
@@ -662,7 +662,7 @@ static int do_read(pa_pstream *p) {
 
         length = ntohl(p->read.descriptor[PA_PSTREAM_DESCRIPTOR_LENGTH]);
 
-        if (length > FRAME_SIZE_MAX_ALLOW) {
+        if (length > FRAME_SIZE_MAX_ALLOW || length <= 0) {
             pa_log_warn("Recieved invalid frame size : %lu", (unsigned long) length);
             return -1;
         }