diff --git a/dumb/include/dumb.h b/dumb/include/dumb.h
index d82afe6f69..f0799c7faa 100644
--- a/dumb/include/dumb.h
+++ b/dumb/include/dumb.h
@@ -233,7 +233,6 @@ int32 DUMBEXPORT duh_get_length(DUH *duh);
 
 const char *DUMBEXPORT duh_get_tag(DUH *duh, const char *key);
 
-
 /* Signal Rendering Functions */
 
 typedef struct DUH_SIGRENDERER DUH_SIGRENDERER;
@@ -610,6 +609,8 @@ sigdata_t *DUMBEXPORT duh_get_raw_sigdata(DUH *duh, int sig, int32 type);
 DUH_SIGRENDERER *DUMBEXPORT duh_encapsulate_raw_sigrenderer(sigrenderer_t *vsigrenderer, DUH_SIGTYPE_DESC *desc, int n_channels, int32 pos);
 sigrenderer_t *DUMBEXPORT duh_get_raw_sigrenderer(DUH_SIGRENDERER *sigrenderer, int32 type);
 
+int DUMBEXPORT duh_add_signal(DUH *duh, DUH_SIGTYPE_DESC *desc, sigdata_t *sigdata);
+
 
 /* Standard Signal Types */
 
diff --git a/dumb/src/core/makeduh.c b/dumb/src/core/makeduh.c
index 598b637bce..24f29259b1 100644
--- a/dumb/src/core/makeduh.c
+++ b/dumb/src/core/makeduh.c
@@ -130,3 +130,22 @@ DUH *make_duh(
 
 	return duh;
 }
+
+int DUMBEXPORT duh_add_signal(DUH *duh, DUH_SIGTYPE_DESC *desc, sigdata_t *sigdata)
+{
+	DUH_SIGNAL **signal;
+
+	if ( !duh || !desc || !sigdata ) return -1;
+
+	signal = ( DUH_SIGNAL ** ) realloc( duh->signal, ( duh->n_signals + 1 ) * sizeof( *duh->signal ) );
+	if ( !signal ) return -1;
+	duh->signal = signal;
+
+	memmove( signal + 1, signal, duh->n_signals * sizeof( *signal ) );
+	duh->n_signals++;
+
+	signal[ 0 ] = make_signal( desc, sigdata );
+	if ( !signal[ 0 ] ) return -1;
+
+	return 0;
+}
diff --git a/dumb/src/core/rawsig.c b/dumb/src/core/rawsig.c
index a1edd60d04..2287bb0684 100644
--- a/dumb/src/core/rawsig.c
+++ b/dumb/src/core/rawsig.c
@@ -29,16 +29,30 @@
  */
 sigdata_t *DUMBEXPORT duh_get_raw_sigdata(DUH *duh, int sig, int32 type)
 {
+	int i;
 	DUH_SIGNAL *signal;
 
 	if (!duh) return NULL;
 
-	if ((unsigned int)sig >= (unsigned int)duh->n_signals) return NULL;
+	if ( sig >= 0 )
+	{
+		if ((unsigned int)sig >= (unsigned int)duh->n_signals) return NULL;
 
-	signal = duh->signal[sig];
+		signal = duh->signal[sig];
 
-	if (signal && signal->desc->type == type)
-		return signal->sigdata;
+		if (signal && signal->desc->type == type)
+			return signal->sigdata;
+	}
+	else
+	{
+		for ( i = 0; i < duh->n_signals; i++ )
+		{
+			signal = duh->signal[i];
+
+			if (signal && signal->desc->type == type)
+				return signal->sigdata;
+		}
+	}
 
 	return NULL;
 }
diff --git a/dumb/src/it/itmisc.c b/dumb/src/it/itmisc.c
index 1045af8fa3..5a45d3192e 100644
--- a/dumb/src/it/itmisc.c
+++ b/dumb/src/it/itmisc.c
@@ -24,7 +24,7 @@
 
 DUMB_IT_SIGDATA *DUMBEXPORT duh_get_it_sigdata(DUH *duh)
 {
-	return duh_get_raw_sigdata(duh, 0, SIGTYPE_IT);
+	return duh_get_raw_sigdata(duh, -1, SIGTYPE_IT);
 }