diff --git a/mcrouter/configure.ac b/mcrouter/configure.ac
index 0257f7876..8d64cb75b 100644
--- a/mcrouter/configure.ac
+++ b/mcrouter/configure.ac
@@ -56,7 +56,7 @@ LT_INIT
 
 CXXFLAGS="-fno-strict-aliasing -std=c++20 $CXXFLAGS"
 CXXFLAGS="-W -Wall -Wextra -Wno-unused-parameter $CXXFLAGS"
-CXXFLAGS=" -Wno-missing-field-initializers -Wno-deprecated $CXXFLAGS"
+CXXFLAGS=" -Wno-missing-field-initializers -Wno-deprecated-declarations $CXXFLAGS"
 CXXFLAGS="-DLIBMC_FBTRACE_DISABLE -DDISABLE_COMPRESSION $CXXFLAGS"
 
 CFLAGS="-DLIBMC_FBTRACE_DISABLE -DDISABLE_COMPRESSION $CFLAGS"