diff --git a/TARGETS b/TARGETS
index b7dae2caa..7d0d71818 100644
--- a/TARGETS
+++ b/TARGETS
@@ -46,7 +46,10 @@ rocksdb_preprocessor_flags = [
 ]
 
 rocksdb_arch_preprocessor_flags = {
-    "x86_64": ["-DHAVE_SSE42"],
+    "x86_64": [
+        "-DHAVE_SSE42",
+        "-DHAVE_PCLMUL",
+    ],
 }
 
 build_mode = read_config("fbcode", "build_mode")
diff --git a/buckifier/targets_cfg.py b/buckifier/targets_cfg.py
index 7aee5bdc9..44ef4fd5e 100644
--- a/buckifier/targets_cfg.py
+++ b/buckifier/targets_cfg.py
@@ -50,7 +50,10 @@ rocksdb_preprocessor_flags = [
 ]
 
 rocksdb_arch_preprocessor_flags = {
-    "x86_64": ["-DHAVE_SSE42"],
+    "x86_64": [
+        "-DHAVE_SSE42",
+        "-DHAVE_PCLMUL",
+    ],
 }
 
 build_mode = read_config("fbcode", "build_mode")