diff --git a/src/memory.rs b/src/memory.rs
index e9748ba62c7..cde494d7aac 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -418,9 +418,9 @@ pub fn dump_allocs(&self, mut allocs: Vec<AllocId>) {
 
             let alloc = match (self.alloc_map.get(&id), self.functions.get(&id)) {
                 (Some(a), None) => a,
-                (None, Some(_)) => {
-                    // FIXME: print function name
-                    trace!("{} function pointer", msg);
+                (None, Some(fn_def)) => {
+                    let name = ty::tls::with(|tcx| tcx.item_path_str(fn_def.def_id));
+                    trace!("{} function pointer: {}: {}", msg, name, fn_def.sig);
                     continue;
                 },
                 (None, None) => {