diff --git a/lib/singlepass-backend/src/emitter_x64.rs b/lib/singlepass-backend/src/emitter_x64.rs
index 889b1099d..f94de7013 100644
--- a/lib/singlepass-backend/src/emitter_x64.rs
+++ b/lib/singlepass-backend/src/emitter_x64.rs
@@ -89,6 +89,8 @@ pub trait Emitter {
     fn get_label(&mut self) -> Self::Label;
     fn get_offset(&mut self) -> Self::Offset;
 
+    fn emit_u64(&mut self, x: u64);
+
     fn emit_label(&mut self, label: Self::Label);
 
     fn emit_mov(&mut self, sz: Size, src: Location, dst: Location);
@@ -490,6 +492,10 @@ impl Emitter for Assembler {
         self.offset()
     }
 
+    fn emit_u64(&mut self, x: u64) {
+        self.push_u64(x);
+    }
+
     fn emit_label(&mut self, label: Self::Label) {
         dynasm!(self ; => label);
     }