1 files changed, 6 insertions, 1 deletions
diff --git a/gr-trellis/src/examples/python/test_viterbi_equalization.py b/gr-trellis/src/examples/python/test_viterbi_equalization.py
index c80f36a54b..91dc7e36da 100755
--- a/gr-trellis/src/examples/python/test_viterbi_equalization.py
+++ b/gr-trellis/src/examples/python/test_viterbi_equalization.py
@@ -2,12 +2,17 @@
 
 from gnuradio import gr
 from gnuradio import trellis, digital
-from gnuradio import analog
 from gnuradio import eng_notation
 import math
 import sys
 import fsm_utils
 
+try:
+    from gnuradio import analog
+except ImportError:
+    sys.stderr.write("Error: Program requires gr-analog.\n")
+    sys.exit(1)
+
 def run_test (f,Kb,bitspersymbol,K,dimensionality,tot_constellation,N0,seed):
     tb = gr.top_block ()