diff --git a/build/Makefile b/build/Makefile
index 2886d82..4227220 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -1,5 +1,7 @@
 VERSION_AND_REVISION = $(shell git describe --tags --dirty | sed -e 's/^v//')
 PKG_ID = traymenu_${VERSION_AND_REVISION}_all
+PYMOD_VERSION = $(shell PYTHONPATH=../src:$$PYTHONPATH python3 -c \
+                        'import traymenu; print(traymenu.__version__)')
 
 BUILD_DIR = ./build_dir
 BASE_DIR = ${BUILD_DIR}/${PKG_ID}
@@ -29,6 +31,11 @@ copy_files:
 	cp ../doc/traymenu.svg ${ICON_DIR}
 	chmod -R g-w ${BASE_DIR}
 
+.PHONY: show_version
+show_version:
+	@echo "Traymenu version according to git: '${VERSION_AND_REVISION}'"
+	@echo "Traymenu version according to Python: '${PYMOD_VERSION}'"
+
 .PHONY: clean
 clean:
 	rm -rf ${BUILD_DIR}
diff --git a/src/bin/traymenu b/src/bin/traymenu
index e503b3f..b78568c 100755
--- a/src/bin/traymenu
+++ b/src/bin/traymenu
@@ -4,6 +4,7 @@
 A Gtk- or Qt-based menu for the system tray to execute arbitrary commands.
 """
 
+import os.path
 import signal
 import sys
 import tempfile
@@ -35,7 +36,9 @@ def get_config() -> traymenu.Config:
         return config
 
     except ValueError as e:
-        usage_str = traymenu.USAGE_STR.replace("traymenu", sys.argv[0], 1)
+        usage_str = (traymenu.USAGE_STR.
+                     replace("traymenu", os.path.basename(sys.argv[0]), 1).
+                     replace("<VERSION>", traymenu.__version__))
         print(f"Error: {e}")
         print()
         print(usage_str, end="")
diff --git a/src/traymenu/__init__.py b/src/traymenu/__init__.py
index 64d0276..22949dc 100644
--- a/src/traymenu/__init__.py
+++ b/src/traymenu/__init__.py
@@ -1,3 +1,5 @@
+__version__ = "0.1"
+
 from traymenu.config import Config, USAGE_STR, \
          MenuItem, Separator, SubmenuStart, SubmenuEnd, MenuEntry
 from traymenu.exec import run_command, run_command_wrapper, debug_output
diff --git a/src/traymenu/config.py b/src/traymenu/config.py
index 7ed99e1..58c0bed 100644
--- a/src/traymenu/config.py
+++ b/src/traymenu/config.py
@@ -17,6 +17,7 @@
                                 --submenu <label> |
                                 --separator |
                                 --submenu-end } )
+Program version: <VERSION>
 """