diff --git a/src/secp256k1/CMakeLists.txt b/src/secp256k1/CMakeLists.txt
--- a/src/secp256k1/CMakeLists.txt
+++ b/src/secp256k1/CMakeLists.txt
@@ -133,6 +133,12 @@
 	set(ENABLE_MODULE_SCHNORR 1)
 endif()
 
+# Endomorphism
+option(SECP256K1_ENABLE_ENDOMORPHISM "Enable endomorphism" OFF)
+if(SECP256K1_ENABLE_ENDOMORPHISM)
+	set(USE_ENDOMORPHISM 1)
+endif()
+
 # Make the emult window size customizable.
 set(SECP256K1_ECMULT_WINDOW_SIZE 15 CACHE STRING "Window size for ecmult precomputation for verification, specified as integer in range [2..24].")
 
diff --git a/src/secp256k1/src/libsecp256k1-config.h.cmake.in b/src/secp256k1/src/libsecp256k1-config.h.cmake.in
--- a/src/secp256k1/src/libsecp256k1-config.h.cmake.in
+++ b/src/secp256k1/src/libsecp256k1-config.h.cmake.in
@@ -21,6 +21,8 @@
 
 #cmakedefine USE_ASM_X86_64
 
+#cmakedefine USE_ENDOMORPHISM
+
 #cmakedefine USE_ECMULT_STATIC_PRECOMPUTATION
 #define ECMULT_WINDOW_SIZE ${SECP256K1_ECMULT_WINDOW_SIZE}
 
diff --git a/src/secp256k1/travis/build_cmake.sh b/src/secp256k1/travis/build_cmake.sh
--- a/src/secp256k1/travis/build_cmake.sh
+++ b/src/secp256k1/travis/build_cmake.sh
@@ -25,6 +25,7 @@
   -DSECP256K1_ENABLE_MODULE_RECOVERY=$RECOVERY \
   -DSECP256K1_ENABLE_MODULE_SCHNORR=$SCHNORR \
   -DSECP256K1_ENABLE_JNI=$JNI \
+  -DSECP256K1_ENABLE_ENDOMORPHISM=$ENDOMORPHISM \
   -DUSE_ASM_X86_64=$ASM \
   $USE_GMP \
   $TOOLCHAIN_FILE \