diff --git a/.gitignore b/.gitignore
index e872bf2d1..0bd013576 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ configure
 dddrun*
 doxygen-doc
 gdbrun*
+gmon.out
 internals.txt
 verilator.txt
 verilator_bin*