diff --git a/generator/protoc-gen-nanopb b/generator/protoc-gen-nanopb
index 2de56216c269728fab4d1746489ee63961b53e8f..595c65f78e4bfaa06868434c67f6269ebea1b4a1 100755
--- a/generator/protoc-gen-nanopb
+++ b/generator/protoc-gen-nanopb
@@ -10,4 +10,5 @@
 # --plugin= on the command line.
 
 MYPATH=$(dirname "$0")
+PYTHON=$(which python2 || which python)
 exec python "$MYPATH/nanopb_generator.py" --protoc-plugin