diff --git a/cranelift/filetests/simple_gvn/reject.cton b/cranelift/filetests/simple_gvn/reject.cton
index 5544ddbd75..00d88e5e66 100644
--- a/cranelift/filetests/simple_gvn/reject.cton
+++ b/cranelift/filetests/simple_gvn/reject.cton
@@ -39,3 +39,18 @@ ebb0:
 ; check: v5 = trueif eq v4
     return v6
 }
+
+function %spill() -> i32 {
+ebb0:
+    v0 = iconst.i32 7
+    v1 = spill v0
+    v2 = fill v1
+    v3 = spill v0
+    v4 = fill v1
+    v5 = bor v2, v4
+; check: v1 = spill v0
+; check: v2 = fill v1
+; check: v3 = spill v0
+; check: v4 = fill v1
+    return v5
+}
diff --git a/lib/cretonne/meta/base/instructions.py b/lib/cretonne/meta/base/instructions.py
index b27a3bf674..f8b6ea989e 100644
--- a/lib/cretonne/meta/base/instructions.py
+++ b/lib/cretonne/meta/base/instructions.py
@@ -501,7 +501,7 @@ spill = Instruction(
         This instruction behaves exactly like :inst:`copy`, but the result
         value is assigned to a spill slot.
         """,
-        ins=x, outs=a)
+        ins=x, outs=a, can_store=True)
 
 fill = Instruction(
         'fill', r"""
@@ -510,7 +510,7 @@ fill = Instruction(
         This instruction behaves exactly like :inst:`copy`, but creates a new
         SSA value for the spilled input value.
         """,
-        ins=x, outs=a)
+        ins=x, outs=a, can_load=True)
 
 src = Operand('src', regunit)
 dst = Operand('dst', regunit)