diff.diff

diff --git a/src/6model/reprs/P6opaque.c b/src/6model/reprs/P6opaque.c
index 932fea4..49c608d 100644
--- a/src/6model/reprs/P6opaque.c
+++ b/src/6model/reprs/P6opaque.c
@@ -1751,6 +1751,7 @@ static void spesh(MVMThreadContext *tc, MVMSTable *st, MVMSpeshGraph *g, MVMSpes
                 ins->operands[0] = orig_operands[0];
                 ins->operands[1] = orig_operands[1];
                 ins->operands[2].lit_i16 = repr_data->attribute_offsets[repr_data->unbox_int_slot];
+                MVM_spesh_get_and_use_facts(tc, g, orig_operands[1]);
             }
         }
         break;
@@ -1765,6 +1766,7 @@ static void spesh(MVMThreadContext *tc, MVMSTable *st, MVMSpeshGraph *g, MVMSpes
                 ins->operands[0] = orig_operands[0];
                 ins->operands[1] = orig_operands[1];
                 ins->operands[2].lit_i16 = repr_data->attribute_offsets[repr_data->unbox_num_slot];
+                MVM_spesh_get_and_use_facts(tc, g, orig_operands[1]);
             }
         }
         break;
@@ -1779,6 +1781,7 @@ static void spesh(MVMThreadContext *tc, MVMSTable *st, MVMSpeshGraph *g, MVMSpes
                 ins->operands[0] = orig_operands[0];
                 ins->operands[1] = orig_operands[1];
                 ins->operands[2].lit_i16 = repr_data->attribute_offsets[repr_data->unbox_str_slot];
+                MVM_spesh_get_and_use_facts(tc, g, orig_operands[1]);
             }
         }
         break;