diff --git a/dtool/pptempl/Global.gmsvc.pp b/dtool/pptempl/Global.gmsvc.pp
index 7cbc58e24c..329fa11e71 100644
--- a/dtool/pptempl/Global.gmsvc.pp
+++ b/dtool/pptempl/Global.gmsvc.pp
@@ -119,7 +119,7 @@
 // '#defer extra_cflags $[extra_cflags] /STUFF' will never work because extra_cflags hasnt been
 // defined yet, so this just evaluates the reference to null and removes the reference and the
 // the defining extra_cflags in individual sources.pp's will not picked up.  use END_FLAGS instead
-#defer extra_cflags /EHsc /Zm400 /DWIN32_VC /DWIN32 $[WARNING_LEVEL_FLAG] $[END_CFLAGS]
+#defer extra_cflags /EHsc /Zm500 /DWIN32_VC /DWIN32 $[WARNING_LEVEL_FLAG] $[END_CFLAGS]
 
 #defer DECYGWINED_INC_PATHLIST_ARGS $[decygwin %,/I"%",$[EXTRA_INCPATH] $[ipath] $[WIN32_PLATFORMSDK_INCPATH]]
 #defer MAIN_C_COMPILE_ARGS /nologo /c $[DECYGWINED_INC_PATHLIST_ARGS] $[flags] $[extra_cflags] "$[osfilename $[source]]"
diff --git a/dtool/pptempl/Global.msvc.pp b/dtool/pptempl/Global.msvc.pp
index 3dcc841ff6..9d78572e73 100644
--- a/dtool/pptempl/Global.msvc.pp
+++ b/dtool/pptempl/Global.msvc.pp
@@ -127,7 +127,7 @@
 #define extra_defines FORCE_INLINING HAVE_DINKUM WIN32_VC WIN32
 
 // Additional compiler flags.
-#defer extra_cflags /EHsc /Zm400 $[WARNING_LEVEL_FLAG] $[END_CFLAGS]
+#defer extra_cflags /EHsc /Zm500 $[WARNING_LEVEL_FLAG] $[END_CFLAGS]
 
 #defer interrogate_ipath $[decygwin %,-I"%",$[target_ipath]]
 #defer interrogate_spath $[decygwin %,-S"%",$[install_parser_inc_dir]]