diff --git a/src/secp256k1/CMakeLists.txt b/src/secp256k1/CMakeLists.txt
--- a/src/secp256k1/CMakeLists.txt
+++ b/src/secp256k1/CMakeLists.txt
@@ -65,9 +65,10 @@
 	set(USE_SCALAR_INV_BUILTIN 1)
 endif()
 
+set(SECP256K1_USE_ASM "x86_64" CACHE STRING "Attempt to use the target ASM implementation. Can be x86_64 or ARM")
+
 # We check if amd64 asm is supported.
-option(SECP256K1_USE_ASM "Use assembly if available" ON)
-if($SECP256K1_USE_ASM)
+if(SECP256K1_USE_ASM MATCHES "x86_64")
 	check_c_source_compiles("
 		#include <stdint.h>
 		int main() {
@@ -76,8 +77,11 @@
 			return 0;
 		}
 	" USE_ASM_X86_64)
-else()
-	set(USE_ASM_X86_64 0)
+elseif(SECP256K1_USE_ASM MATCHES "ARM")
+	enable_language(ASM)
+	set(USE_EXTERNAL_ASM 1)
+	add_library(secp256k1_common src/asm/field_10x26_arm.s)
+	target_link_libraries(secp256k1 secp256k1_common)
 endif()
 
 # We make sure __int128 is defined
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
@@ -20,6 +20,7 @@
 #cmakedefine USE_FIELD_10X26
 
 #cmakedefine USE_ASM_X86_64
+#cmakedefine USE_EXTERNAL_ASM
 
 #cmakedefine USE_ENDOMORPHISM
 #cmakedefine USE_EXTERNAL_DEFAULT_CALLBACKS