diff --git a/eden/fs/fuse/FuseChannel.cpp b/eden/fs/fuse/FuseChannel.cpp
index 8e6e12a1ae..9efb57511b 100644
--- a/eden/fs/fuse/FuseChannel.cpp
+++ b/eden/fs/fuse/FuseChannel.cpp
@@ -10,6 +10,7 @@
 #include "eden/fs/fuse/FuseChannel.h"
 
 #include <boost/cast.hpp>
+#include <fmt/core.h>
 #include <folly/futures/Future.h>
 #include <folly/logging/xlog.h>
 #include <folly/system/ThreadName.h>
@@ -546,7 +547,7 @@ std::string capsFlagsToLabel(uint32_t flags) {
   if (flags == 0) {
     return str;
   }
-  return folly::format("{} unknown:0x{:x}", str, flags).str();
+  return fmt::format("{} unknown:0x{:x}", str, flags);
 }
 
 void sigusr2Handler(int /* signum */) {
diff --git a/eden/fs/service/EdenServer.cpp b/eden/fs/service/EdenServer.cpp
index 221eece96d..622e6ed600 100644
--- a/eden/fs/service/EdenServer.cpp
+++ b/eden/fs/service/EdenServer.cpp
@@ -17,6 +17,7 @@
 #include <sstream>
 
 #include <fb303/ServiceData.h>
+#include <fmt/core.h>
 #include <folly/Exception.h>
 #include <folly/FileUtil.h>
 #include <folly/SocketAddress.h>
@@ -459,13 +460,12 @@ void EdenServer::ProgressManager::printProgresses(
       content += folly::to<std::string>("Remounting ", it.mountPath, "\n");
       printedFinished++;
     } else {
-      content += folly::format(
-                     "[{:21}] {:>3}%: fsck on {}{}",
-                     std::string(it.fsckPercentComplete * 2, '=') + ">",
-                     it.fsckPercentComplete * 10,
-                     it.localDir,
-                     "\n")
-                     .str();
+      content += fmt::format(
+          "[{:21}] {:>3}%: fsck on {}{}",
+          std::string(it.fsckPercentComplete * 2, '=') + ">",
+          it.fsckPercentComplete * 10,
+          it.localDir,
+          "\n");
       printedInProgress++;
     }
     totalLinesPrinted++;
diff --git a/eden/fs/service/EdenServiceHandler.cpp b/eden/fs/service/EdenServiceHandler.cpp
index 7f402101d3..d27a2b87dd 100644
--- a/eden/fs/service/EdenServiceHandler.cpp
+++ b/eden/fs/service/EdenServiceHandler.cpp
@@ -218,7 +218,7 @@ class ThriftLogHelper {
   ~ThriftLogHelper() {
     // Logging completion time for the request
     // The line number points to where the object was originally created
-    TLOG(itcLogger_, level_, itcFileName_, itcLineNumber_) << folly::format(
+    TLOG(itcLogger_, level_, itcFileName_, itcLineNumber_) << folly::sformat(
         "{}() took {:,} " EDEN_MICRO,
         itcFunctionName_,
         itcTimer_.elapsed().count());