diff --git a/librtmp/rtmp.c b/librtmp/rtmp.c
index 5ef3ae9..e559c6e 100644
--- a/librtmp/rtmp.c
+++ b/librtmp/rtmp.c
@@ -1333,7 +1333,7 @@ ReadN(RTMP *r, char *buffer, int n)
 	    SendBytesReceived(r);
 	}
       /*RTMP_Log(RTMP_LOGDEBUG, "%s: %d bytes\n", __FUNCTION__, nBytes); */
-#ifdef _DEBUG
+#if defined(_DEBUG) && !defined(LIBRTMP_ONLY)
       fwrite(ptr, 1, nBytes, netstackdump_read);
 #endif
 
@@ -3553,7 +3553,7 @@ RTMPSockBuf_Send(RTMPSockBuf *sb, const char *buf, int len)
 {
   int rc;
 
-#ifdef _DEBUG
+#if defined(_DEBUG) && !defined(LIBRTMP_ONLY)
   fwrite(buf, 1, len, netstackdump);
 #endif