diff --git a/module/language/cps/compile-rtl.scm b/module/language/cps/compile-rtl.scm
index b1267385c..0fe321691 100644
--- a/module/language/cps/compile-rtl.scm
+++ b/module/language/cps/compile-rtl.scm
@@ -316,6 +316,8 @@
                            (((k . _) . _) k)
                            (() #f))))
          (emit-label asm k)
+         (when src
+           (emit-source asm src))
          (emit-rtl k exp-k exp next-label)
          (lp exps))))))
 
@@ -335,6 +337,8 @@
                                 kw))
                (nlocals (lookup-nlocals k allocation)))
            (emit-label asm k)
+           (when src
+             (emit-source asm src))
            (emit-begin-kw-arity asm req opt rest kw-indices allow-other-keys?
                                 nlocals alternate)
            (emit-rtl-sequence asm body allocation nlocals cont-table)
@@ -353,6 +357,8 @@
     (match f
       (($ $fun meta free ($ $cont k src ($ $kentry self tail clauses)))
        (emit-begin-program asm k (or meta '()))
+       (when src
+         (emit-source asm src))
        (emit-fun-clauses clauses)
        (emit-end-program asm)))))
 
diff --git a/module/system/vm/assembler.scm b/module/system/vm/assembler.scm
index 26dc3457b..4ce64cf61 100644
--- a/module/system/vm/assembler.scm
+++ b/module/system/vm/assembler.scm
@@ -169,7 +169,7 @@
             word-size endianness
             constants inits
             shstrtab next-section-number
-            meta)
+            meta sources)
   asm?
 
   ;; We write RTL code into what is logically a growable vector,
@@ -239,7 +239,13 @@
 
   ;; A list of <meta>, corresponding to procedure metadata.
   ;;
-  (meta asm-meta set-asm-meta!))
+  (meta asm-meta set-asm-meta!)
+
+  ;; A list of (pos . source) pairs, indicating source information.  POS
+  ;; is relative to the beginning of the text section, and SOURCE is in
+  ;; the same format that source-properties returns.
+  ;;
+  (sources asm-sources set-asm-sources!))
 
 (define-inlinable (fresh-block)
   (make-u32vector *block-size*))
@@ -254,7 +260,7 @@ target."
             word-size endianness
             vlist-null '()
             (make-string-table) 1
-            '()))
+            '() '()))
 
 (define (intern-section-name! asm string)
   "Add a string to the section name table (shstrtab)."
@@ -726,6 +732,9 @@ returned instead."
 (define-macro-assembler (label asm sym)
   (set-asm-labels! asm (acons sym (asm-start asm) (asm-labels asm))))
 
+(define-macro-assembler (source asm source)
+  (set-asm-sources! asm (acons (asm-start asm) source (asm-sources asm))))
+
 (define-macro-assembler (cache-current-module! asm module scope)
   (let ((mod-label (intern-module-cache-cell asm scope)))
     (emit-static-set! asm module mod-label 0)))