diff --git a/org.gnome.Geary.json b/org.gnome.Geary.json
index 6a3cc18b..00712cd6 100644
--- a/org.gnome.Geary.json
+++ b/org.gnome.Geary.json
@@ -45,6 +45,22 @@
         "*.a"
     ],
     "modules": [
+        {
+            "name": "libunwind",
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://github.com/libunwind/libunwind.git",
+                    "branch": "master"
+                },
+                {
+                    "type": "script",
+                    "commands": [
+                        "autoreconf -sif"
+                    ]
+                }
+            ]
+        },
         {
             "name" : "libproxy",
             "buildsystem" : "meson",