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-rw-r--r--lib/coq/Sail2_string.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/coq/Sail2_string.v b/lib/coq/Sail2_string.v
index 543b0fad..a0a23933 100644
--- a/lib/coq/Sail2_string.v
+++ b/lib/coq/Sail2_string.v
@@ -1,4 +1,5 @@
Require Import Sail2_values.
+Require Import Coq.Strings.Ascii.
Definition string_sub (s : string) (start : Z) (len : Z) : string :=
String.substring (Z.to_nat start) (Z.to_nat len) s.