diff --git a/test/sanitizer_suppressions/ubsan b/test/sanitizer_suppressions/ubsan
index 682ec7f60b..a4f7f9822f 100644
--- a/test/sanitizer_suppressions/ubsan
+++ b/test/sanitizer_suppressions/ubsan
@@ -81,3 +81,5 @@ implicit-integer-sign-change:primitives/confidential.cpp
 implicit-integer-sign-change:primitives/confidential.h
 shift-base:simplicity/sha256.c
 unsigned-integer-overflow:simplicity/sha256.c
+# See comment in simplicity/primitive/elements/env.c line 303
+unsigned-integer-overflow:simplicity/primitive/elements/env.c