diff --git a/Compile-firmware.md b/Compile-firmware.md
index f50c9f8..1d3bdf3 100644
--- a/Compile-firmware.md
+++ b/Compile-firmware.md
@@ -200,7 +200,7 @@ some compiling errors to check it's better to call it without '-j 8')
     cmake ..
     make firmware
 
-If you want, use -j argument to increase the compile speed, for example `make -j firimware` to auto decide the number of threads to compile, or manually set the thread numbers, for example `make -j4 firmware`
+If you want, use -j argument to increase the compile speed, for example `make -j firmware` to auto decide the numbers of threads to compile, or manually set the thread numbers, for example `make -j4 firmware`
 
 ## 8. Flash the firmware to HackRF