diff --git a/secp256k1-sys/depend/secp256k1/src/util.h b/secp256k1-sys/depend/secp256k1/src/util.h
index 5de62d4ed..613901ef3 100644
--- a/secp256k1-sys/depend/secp256k1/src/util.h
+++ b/secp256k1-sys/depend/secp256k1/src/util.h
@@ -8,9 +8,7 @@
 #define SECP256K1_UTIL_H
 
 #include "../include/secp256k1.h"
-extern int rustsecp256k1_v0_9_0_ecdsa_signature_parse_compact(
-        const rustsecp256k1_v0_9_0_context *ctx,
-        rustsecp256k1_v0_9_0_ecdsa_signature *sig, const unsigned char *input64);
+
 #include <stdlib.h>
 #include <stdint.h>
 #include <stdio.h>
diff --git a/secp256k1-sys/depend/util.h.patch b/secp256k1-sys/depend/util.h.patch
deleted file mode 100644
index 59b23e0df..000000000
--- a/secp256k1-sys/depend/util.h.patch
+++ /dev/null
@@ -1,6 +0,0 @@
-10c10,12
-< 
----
-> extern int secp256k1_ecdsa_signature_parse_compact(
->         const secp256k1_context *ctx,
->         secp256k1_ecdsa_signature *sig, const unsigned char *input64);
diff --git a/secp256k1-sys/vendor-libsecp.sh b/secp256k1-sys/vendor-libsecp.sh
index ed437fc07..e48641287 100755
--- a/secp256k1-sys/vendor-libsecp.sh
+++ b/secp256k1-sys/vendor-libsecp.sh
@@ -97,7 +97,6 @@ echo "$SOURCE_REV" >> ./secp256k1-HEAD-revision.txt
 patch "$DIR/include/secp256k1.h" "./secp256k1.h.patch"
 patch "$DIR/src/secp256k1.c" "./secp256k1.c.patch"
 patch "$DIR/src/scratch_impl.h" "./scratch_impl.h.patch"
-patch "$DIR/src/util.h" "./util.h.patch"
 
 # Fix a linking error while cross-compiling to windowns with mingw
 patch "$DIR/contrib/lax_der_parsing.c" "./lax_der_parsing.c.patch"