diff --git a/firmware/.gitignore b/firmware/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..d9c69017bc9affb03b2519d1dbb1e5cc88abfcdc
--- /dev/null
+++ b/firmware/.gitignore
@@ -0,0 +1,6 @@
+*.gen.S
+*.fw
+*.bin
+*.csp
+*.dsp
+ihex2fw
diff --git a/firmware/Makefile b/firmware/Makefile
index e4f2fb3d1917dc78378c47640021e689b6d1c293..9fe86041f86e547fe71753609be8c56c0ae27dcc 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -56,7 +56,7 @@ fw-shipped-$(CONFIG_USB_SERIAL_KEYSPAN_USA28X) += keyspan/usa28x.fw
 fw-shipped-$(CONFIG_USB_SERIAL_KEYSPAN_USA49W) += keyspan/usa49w.fw
 fw-shipped-$(CONFIG_USB_SERIAL_KEYSPAN_USA49WLC) += keyspan/usa49wlc.fw
 else
-fw-shipped- := keyspan/mpr.fw keyspan/usa18x.fw keyspan/usa19.fw	\
+fw-shipped- += keyspan/mpr.fw keyspan/usa18x.fw keyspan/usa19.fw	\
 	keyspan/usa19qi.fw keyspan/usa19qw.fw keyspan/usa19w.fw		\
 	keyspan/usa28.fw keyspan/usa28xa.fw keyspan/usa28xb.fw		\
 	keyspan/usa28x.fw keyspan/usa49w.fw keyspan/usa49wlc.fw