diff --git a/cross/wasm.txt b/cross/wasm32-emscripten.txt
similarity index 58%
rename from cross/wasm.txt
rename to cross/wasm32-emscripten.txt
index 1b589d61b..f57ddba84 100644
--- a/cross/wasm.txt
+++ b/cross/wasm32-emscripten.txt
@@ -2,16 +2,10 @@
 c = 'emcc'
 cpp = 'em++'
 ar = 'emar'
+ranlib = 'emranlib'
 exe_wrapper = 'node'
 
-[built-in options]
-c_args = []
-c_link_args = ['-sEXPORT_ALL=1']
-cpp_args = []
-cpp_link_args = ['-sEXPORT_ALL=1']
-
 [host_machine]
-
 system = 'emscripten'
 cpu_family = 'wasm32'
 cpu = 'wasm32'
diff --git a/cross/wasm64-emscripten.txt b/cross/wasm64-emscripten.txt
new file mode 100644
index 000000000..ea55f3937
--- /dev/null
+++ b/cross/wasm64-emscripten.txt
@@ -0,0 +1,18 @@
+[binaries]
+c = 'emcc'
+cpp = 'em++'
+ar = 'emar'
+ranlib = 'emranlib'
+exe_wrapper = 'node'
+
+[built-in options]
+c_args = ['-m64']
+c_link_args = ['-m64']
+cpp_args = ['-m64']
+cpp_link_args = ['-m64']
+
+[host_machine]
+system = 'emscripten'
+cpu_family = 'wasm64'
+cpu = 'wasm64'
+endian = 'little'