diff --git a/Tupfile.lua b/Tupfile.lua
index 138bd054..c25b4653 100644
--- a/Tupfile.lua
+++ b/Tupfile.lua
@@ -97,7 +97,7 @@ flags = {
 
 cflags = {
   '-std=c11 -pedantic',
-  '-Wall -Wextra -Wno-unused-parameter',
+  '-Wall -Wextra -Wno-unused-parameter -Wno-strict-prototypes',
   config.strict and '-Werror' or '',
   config.optimize and '-fdata-sections -ffunction-sections' or '',
   '-fdiagnostics-color=always',