diff --git a/.gitmodules b/.gitmodules
index d13799558..4c5047f35 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "tools/decomp-permuter"]
 	path = tools/decomp-permuter
 	url = https://github.com/simonlindholm/decomp-permuter
+[submodule "tools/asm-differ"]
+	path = tools/asm-differ
+	url = https://github.com/simonlindholm/asm-differ
diff --git a/decomp-permuter b/decomp-permuter
deleted file mode 160000
index bb41b4db6..000000000
--- a/decomp-permuter
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit bb41b4db604adeaf8369be9b994e27e2d550a9ca
diff --git a/asm-differ b/tools/asm-differ
similarity index 100%
rename from asm-differ
rename to tools/asm-differ
diff --git a/tools/decomp-permuter b/tools/decomp-permuter
new file mode 160000
index 000000000..7f63c768a
--- /dev/null
+++ b/tools/decomp-permuter
@@ -0,0 +1 @@
+Subproject commit 7f63c768a0cc5e357a2fc1f04b2715eae216487f