diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
index 0000000..11c5db6
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,15 @@
+# Makefile for Linux etc.
+
+.PHONY: all clean
+all: nmea2um
+
+SHELL=/bin/bash
+CC=gcc
+CFLAGS=-O3
+LDFLAGS=-lm
+
+nmea2um: nmea2um.o
+	${CC} $< ${LDFLAGS} -o $@
+
+clean:
+	rm -f nmea2um.o nmea2um