diff --git a/configure.ac b/configure.ac
index a9a82a04..292a062a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -114,6 +114,7 @@ TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-declarations])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-prototypes])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wold-style-definition])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wparentheses-equality])
+TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wself-assign])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshadow])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshorten-64-to-32])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wstrict-prototypes])