diff --git a/.gitignore b/.gitignore
index 8a12799b56..55deee36da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 /Tools/autotest/param_metadata/Parameters.wiki
 /Tools/autotest/param_metadata/Parameters.md
 /Tools/autotest/param_metadata/apm.pdef.xml
+/Tools/autotest/param_metadata/apm.pdef.json
 /Tools/autotest/jsb_sim/fgout.xml
 /Tools/autotest/jsb_sim/rascal_test.xml
 /Tools/autotest/jsbsim_fgout_0.xml
@@ -105,6 +106,7 @@ Parameters.md
 Parameters.rst
 Parameters.wiki
 apm.pdef.xml
+apm.pdef.json
 parameters.edn
 # JetBrains IDE files
 .idea/*