diff --git a/third_party/dav1d/BUILD.gn b/third_party/dav1d/BUILD.gn
index aedc658c3..4baeac7df 100644
--- a/third_party/dav1d/BUILD.gn
+++ b/third_party/dav1d/BUILD.gn
@@ -31,9 +31,9 @@ if (current_cpu == "x86" || current_cpu == "x64") {
   } else {
     needs_stack_alignment = true
     if (current_cpu == "x86") {
-      stack_alignment = 16
+      stack_alignment = 4
     } else if (current_cpu == "x64") {
-      stack_alignment = 32
+      stack_alignment = 5
     }
   }
 } else {
@@ -73,7 +73,7 @@ dav1d_copts = [
 if (!is_win) {
   dav1d_copts += [ "-std=c99" ]
   if (needs_stack_alignment) {
-    dav1d_copts += [ "-mstack-alignment=$stack_alignment" ]
+    dav1d_copts += [ "-mpreferred-stack-boundary=$stack_alignment" ]
   }
 }