diff --git a/SConstruct b/SConstruct
index 7973b11..785f8a7 100644
--- a/SConstruct
+++ b/SConstruct
@@ -49,7 +49,8 @@ if 'LDFLAGS' in os.environ:
     env.Append(LINKFLAGS = SCons.Util.CLVar(os.environ['LDFLAGS']))
 
 env.Append(CFLAGS = [ "-Wshadow", "-Wno-typedef-redefinition" ])
-env.Append(CPPFLAGS = [ "-fno-builtin", "-fno-stack-protector" ])
+env.Append(CPPFLAGS = [ "-fno-builtin", "-fno-stack-protector",
+                        "-fno-optimize-sibling-calls" ])
 
 if (env["STRICT"] == "1"):
     env.Append(CPPFLAGS = [ "-Wformat=2", "-Wmissing-format-attribute",