diff --git a/.gitignore b/.gitignore
index e71f7167..cedffbd8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,6 @@ tests/exitminus1
 tests/exitminus1.o
 tests/foo1.txt
 tests/foo2.txt
+
+# IDEs
+.vscode
diff --git a/System/Process/Windows.hsc b/System/Process/Windows.hsc
index c4901120..cdd2a01f 100644
--- a/System/Process/Windows.hsc
+++ b/System/Process/Windows.hsc
@@ -60,7 +60,7 @@ import System.Win32.Process (getProcessId)
 
 ##if defined(i386_HOST_ARCH)
 ## define WINDOWS_CCONV stdcall
-##elif defined(x86_64_HOST_ARCH)
+##elif defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 ## define WINDOWS_CCONV ccall
 ##else
 ## error Unknown mingw32 arch