diff --git a/src/secp256k1/CMakeLists.txt b/src/secp256k1/CMakeLists.txt
--- a/src/secp256k1/CMakeLists.txt
+++ b/src/secp256k1/CMakeLists.txt
@@ -67,14 +67,19 @@
 endif()
 
 # We check if amd64 asm is supported.
-check_c_source_compiles("
-	#include <stdint.h>
-	int main() {
-		uint64_t a = 11, tmp;
-		__asm__ __volatile__(\"movq \$0x100000000,%1; mulq %%rsi\" : \"+a\"(a) : \"S\"(tmp) : \"cc\", \"%rdx\");
-		return 0;
-	}
-" USE_ASM_X86_64)
+option(SECP256K1_USE_ASM "Use assembly if available" ON)
+if($SECP256K1_USE_ASM)
+	check_c_source_compiles("
+		#include <stdint.h>
+		int main() {
+			uint64_t a = 11, tmp;
+			__asm__ __volatile__(\"movq \$0x100000000,%1; mulq %%rsi\" : \"+a\"(a) : \"S\"(tmp) : \"cc\", \"%rdx\");
+			return 0;
+		}
+	" USE_ASM_X86_64)
+else()
+	set(USE_ASM_X86_64 0)
+endif()
 
 # We make sure __int128 is defined
 include(CheckTypeSize)
diff --git a/src/secp256k1/travis/build_autotools.sh b/src/secp256k1/travis/build_autotools.sh
--- a/src/secp256k1/travis/build_autotools.sh
+++ b/src/secp256k1/travis/build_autotools.sh
@@ -22,6 +22,7 @@
   --enable-endomorphism=$ENDOMORPHISM \
   --with-field=$FIELD \
   --with-bignum=$BIGNUM \
+  --with-asm=$ASM \
   --with-scalar=$SCALAR \
   --enable-ecmult-static-precomputation=$STATICPRECOMPUTATION \
   --enable-module-ecdh=$ECDH \
diff --git a/src/secp256k1/travis/build_cmake.sh b/src/secp256k1/travis/build_cmake.sh
--- a/src/secp256k1/travis/build_cmake.sh
+++ b/src/secp256k1/travis/build_cmake.sh
@@ -24,7 +24,7 @@
   -DSECP256K1_ENABLE_JNI=$JNI \
   -DSECP256K1_ENABLE_ENDOMORPHISM=$ENDOMORPHISM \
   -DSECP256K1_ENABLE_BIGNUM=$BIGNUM \
-  -DUSE_ASM_X86_64=$ASM \
+  -DSECP256K1_USE_ASM=$ASM \
   -DUSE_FIELD=$FIELD \
   -DUSE_SCALAR=$SCALAR \
   $CMAKE_EXTRA_FLAGS