diff --git a/configure b/configure
index 00415f0..cf6db3d 100755
--- a/configure
+++ b/configure
@@ -1184,6 +1184,7 @@
 add_to warn_flags -Wexpansion-to-defined
 add_to warn_flags -Wimplicit-fallthrough=2
 add_to warn_flags -Wmissing-format-attribute
+add_to warn_flags -Wthread-safety
 
 nowarn_flags=
 add_to nowarn_flags -Wno-initializer-overrides