diff --git a/js-assembler/assemble-perform-statement.rkt b/js-assembler/assemble-perform-statement.rkt
index 2e8fa69..af19019 100644
--- a/js-assembler/assemble-perform-statement.rkt
+++ b/js-assembler/assemble-perform-statement.rkt
@@ -98,7 +98,7 @@
                           ","))]
     
     [(SetFrameCallee!? op)
-     (format "M.control[M.control.length-1].proc = ~a;"
+     (format "M.control[M.control.length-1].proc=~a;"
              (assemble-oparg (SetFrameCallee!-proc op)))]
     
     [(SpliceListIntoStack!? op)
diff --git a/js-assembler/assemble.rkt b/js-assembler/assemble.rkt
index ded55b9..c4b510b 100644
--- a/js-assembler/assemble.rkt
+++ b/js-assembler/assemble.rkt
@@ -533,7 +533,7 @@ EOF
            (format "M.e.length-=~a;"
                    (assemble-oparg (PopEnvironment-n stmt)))]
           [else
-           (format "M.e.splice(M.e.length-(~a +~a),~a);"
+           (format "M.e.splice(M.e.length-(~a+~a),~a);"
                    (assemble-oparg (PopEnvironment-skip stmt))
                    (assemble-oparg (PopEnvironment-n stmt))
                    (assemble-oparg (PopEnvironment-n stmt)))]))]