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diff --git a/grc/blocks/gr_stream_mux.xml b/grc/blocks/gr_stream_mux.xml
new file mode 100644
index 00000000..8efe7b65
--- /dev/null
+++ b/grc/blocks/gr_stream_mux.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0"?>
+<!--
+###################################################
+##Stream Mux:
+##	all types, many inputs, only one output
+###################################################
+ -->
+<block>
+	<name>Stream Mux</name>
+	<key>gr_stream_mux</key>
+	<import>from gnuradio import gr</import>
+	<make>gr.stream_mux($type.size*$vlen, $lengths)</make>
+	<param>
+		<name>Type</name>
+		<key>type</key>
+		<type>enum</type>
+		<option>
+			<name>Complex</name>
+			<key>complex</key>
+			<opt>size:gr.sizeof_gr_complex</opt>
+		</option>
+		<option>
+			<name>Float</name>
+			<key>float</key>
+			<opt>size:gr.sizeof_float</opt>
+		</option>
+		<option>
+			<name>Int</name>
+			<key>int</key>
+			<opt>size:gr.sizeof_int</opt>
+		</option>
+		<option>
+			<name>Short</name>
+			<key>short</key>
+			<opt>size:gr.sizeof_short</opt>
+		</option>
+		<option>
+			<name>Byte</name>
+			<key>byte</key>
+			<opt>size:gr.sizeof_char</opt>
+		</option>
+	</param>
+	<param>
+		<name>Lengths</name>
+		<key>lengths</key>
+		<value>1, 1</value>
+		<type>int_vector</type>
+	</param>
+	<param>
+		<name>Num Inputs</name>
+		<key>num_inputs</key>
+		<value>2</value>
+		<type>int</type>
+	</param>
+	<param>
+		<name>Vec Length</name>
+		<key>vlen</key>
+		<value>1</value>
+		<type>int</type>
+	</param>
+	<check>$num_inputs &gt; 0</check>
+	<check>$num_inputs == len($lengths)</check>
+	<check>$vlen &gt; 0</check>
+	<sink>
+		<name>in</name>
+		<type>$type</type>
+		<vlen>$vlen</vlen>
+		<nports>$num_inputs</nports>
+	</sink>
+	<source>
+		<name>out</name>
+		<type>$type</type>
+		<vlen>$vlen</vlen>
+	</source>
+</block>