diff --git a/programs/develop/libraries/menuetlibc/src/libc/Tupfile.lua b/programs/develop/libraries/menuetlibc/src/libc/Tupfile.lua
index 3803964b82..68215f3260 100644
--- a/programs/develop/libraries/menuetlibc/src/libc/Tupfile.lua
+++ b/programs/develop/libraries/menuetlibc/src/libc/Tupfile.lua
@@ -68,7 +68,7 @@ FOLDERS = {
   "termios",
 }
 
-CFLAGS="-Os -fno-stack-check -fno-stack-protector -mno-stack-arg-probe -fno-ident -fomit-frame-pointer -fno-asynchronous-unwind-tables -mpreferred-stack-boundary=2 -march=pentium-mmx"
+CFLAGS="-Os -fno-stack-check -fno-stack-protector -mno-stack-arg-probe -fno-ident -fomit-frame-pointer -fno-asynchronous-unwind-tables -mpreferred-stack-boundary=2 -march=pentium-mmx -fgnu89-inline"
 OBJS={}
 for i,v in ipairs(FOLDERS) do
   tup.append_table(OBJS,
diff --git a/programs/use_menuetlibc.lua b/programs/use_menuetlibc.lua
index c135e8a18d..dcb52a0c08 100644
--- a/programs/use_menuetlibc.lua
+++ b/programs/use_menuetlibc.lua
@@ -2,6 +2,7 @@ MELIBC = tup.getcwd() .. "/develop/libraries/menuetlibc"
 
 INCLUDES = INCLUDES .. " -I" .. MELIBC .. "/include"
 STARTUP = MELIBC .. "/stub/crt0.o"
+CFLAGS_c = " -fgnu89-inline"
 LDFLAGS = LDFLAGS .. string.gsub(" -T$/include/scripts/menuetos_app_v01.ld -L$/lib", "%$", MELIBC)
 tup.append_table(LIBDEPS, {MELIBC .. "/<libc>", MELIBC .. "/<libm>", MELIBC .. "/<libcpp>"})
 LIBS = LIBS .. " -lcpp -lm -lc"