diff --git a/ape/ape.S b/ape/ape.S
index bdcfa7d1d..0463e0499 100644
--- a/ape/ape.S
+++ b/ape/ape.S
@@ -783,8 +783,8 @@ ape.pe:	.ascin	"PE",4
 	.long	0			# Checksum
 	.short	v_ntsubsystem		# Subsystem: 0=Neutral,2=GUI,3=Console
 	.short	.LDLLEXE		# DllCharacteristics
-	.quad	0x0000000000020000	# StackReserve
-	.quad	0x0000000000020000	# StackCommit
+	.quad	0x0000000000100000	# StackReserve
+	.quad	0x00000000000fc000	# StackCommit
 	.quad	0			# HeapReserve
 	.quad	0			# HeapCommit
 	.long	0			# LoaderFlags
diff --git a/libc/runtime/winmain.greg.c b/libc/runtime/winmain.greg.c
index 577ae19bb..1e6cbd77d 100644
--- a/libc/runtime/winmain.greg.c
+++ b/libc/runtime/winmain.greg.c
@@ -49,6 +49,8 @@
  * TODO: How can we ensure we never overlap with KERNEL32.DLL?
  */
 
+#define WINSTACK 0x100000
+
 struct WinArgs {
   char *argv[4096];
   char *envp[4096];
@@ -107,7 +109,7 @@ static textwindows wontreturn void WinMainNew(void) {
   NormalizeCmdExe();
   *(/*unconst*/ int *)&__hostos = WINDOWS;
   addr = NtGetVersion() < kNtVersionWindows10 ? 0xff00000 : 0x777000000000;
-  size = ROUNDUP(STACKSIZE + sizeof(struct WinArgs), FRAMESIZE);
+  size = ROUNDUP(WINSTACK + sizeof(struct WinArgs), FRAMESIZE);
   _mmi.p[0].h =
       __mmap$nt((char *)addr, size, PROT_READ | PROT_WRITE | PROT_EXEC, -1, 0)
           .maphandle;
@@ -128,7 +130,7 @@ static textwindows wontreturn void WinMainNew(void) {
   FreeEnvironmentStrings(env16);
   auxv[0][0] = pushpop(0L);
   auxv[0][1] = pushpop(0L);
-  _jmpstack((char *)addr + STACKSIZE, _executive, count, wa->argv, wa->envp,
+  _jmpstack((char *)addr + WINSTACK, _executive, count, wa->argv, wa->envp,
             auxv);
 }