diff --git a/.gitmodules b/.gitmodules
index 38cc202c..ea31cc16 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,3 +2,6 @@
 	path = external/R
 	url = https://github.com/PRL-PRG/r-compiler-server-gnur
 	ignore = untracked
+[submodule "external/R-debug"]
+	path = external/R-debug
+	url = https://github.com/PRL-PRG/r-compiler-server-gnur
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index a5f3abc7..afdff541 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -3,5 +3,6 @@
   <component name="VcsDirectoryMappings">
     <mapping directory="" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/external/R" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/external/R-debug" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/external/R-debug b/external/R-debug
new file mode 160000
index 00000000..c950e70f
--- /dev/null
+++ b/external/R-debug
@@ -0,0 +1 @@
+Subproject commit c950e70f516502534d973992c56a72f6eea77358