diff --git a/libtransmission/file-posix.cc b/libtransmission/file-posix.cc
index 31a6c8172..9ed13254d 100644
--- a/libtransmission/file-posix.cc
+++ b/libtransmission/file-posix.cc
@@ -52,7 +52,7 @@
 #define USE_COPY_FILE_RANGE
 #endif /* __linux__ */
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include "libtransmission/error.h"
 #include "libtransmission/file.h"
diff --git a/libtransmission/handshake.cc b/libtransmission/handshake.cc
index 9d298ed8a..6226e952e 100644
--- a/libtransmission/handshake.cc
+++ b/libtransmission/handshake.cc
@@ -12,7 +12,7 @@
 #include <tuple>
 #include <utility>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include "libtransmission/transmission.h"
 
diff --git a/libtransmission/log.cc b/libtransmission/log.cc
index ef48899e3..07b69c094 100644
--- a/libtransmission/log.cc
+++ b/libtransmission/log.cc
@@ -19,7 +19,7 @@
 #endif
 
 #include <fmt/chrono.h>
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include <small/map.hpp>
 
diff --git a/libtransmission/open-files.cc b/libtransmission/open-files.cc
index 749cdc147..b7b5af28c 100644
--- a/libtransmission/open-files.cc
+++ b/libtransmission/open-files.cc
@@ -9,7 +9,7 @@
 #include <string_view>
 #include <utility>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include "libtransmission/transmission.h"
 
diff --git a/libtransmission/port-forwarding-natpmp.cc b/libtransmission/port-forwarding-natpmp.cc
index b268c9dc2..e24d1017a 100644
--- a/libtransmission/port-forwarding-natpmp.cc
+++ b/libtransmission/port-forwarding-natpmp.cc
@@ -14,7 +14,7 @@
 
 #include <event2/util.h> /* evutil_inet_ntop() */
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #define ENABLE_STRNATPMPERR
 #include "natpmp.h"
diff --git a/libtransmission/port-forwarding-upnp.cc b/libtransmission/port-forwarding-upnp.cc
index 4b5d23776..7863df980 100644
--- a/libtransmission/port-forwarding-upnp.cc
+++ b/libtransmission/port-forwarding-upnp.cc
@@ -13,7 +13,7 @@
 #include <thread>
 #include <utility>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include <miniupnpc/miniupnpc.h>
 #include <miniupnpc/upnpcommands.h>
diff --git a/libtransmission/subprocess-posix.cc b/libtransmission/subprocess-posix.cc
index 8c9591f83..5918d86d4 100644
--- a/libtransmission/subprocess-posix.cc
+++ b/libtransmission/subprocess-posix.cc
@@ -15,7 +15,7 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include "libtransmission/error.h"
 #include "libtransmission/subprocess.h"
diff --git a/libtransmission/variant-json.cc b/libtransmission/variant-json.cc
index 9c87e1c65..9c766b130 100644
--- a/libtransmission/variant-json.cc
+++ b/libtransmission/variant-json.cc
@@ -16,7 +16,7 @@
 #include <utility>
 #include <variant>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include <rapidjson/encodedstream.h>
 #include <rapidjson/encodings.h>
diff --git a/libtransmission/watchdir-win32.cc b/libtransmission/watchdir-win32.cc
index 3f787f38d..cbb9c62e0 100644
--- a/libtransmission/watchdir-win32.cc
+++ b/libtransmission/watchdir-win32.cc
@@ -17,7 +17,7 @@
 #include <event2/event.h>
 #include <event2/util.h>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #define LIBTRANSMISSION_WATCHDIR_MODULE
 
diff --git a/libtransmission/webseed.cc b/libtransmission/webseed.cc
index e3b7b9347..76b8723c9 100644
--- a/libtransmission/webseed.cc
+++ b/libtransmission/webseed.cc
@@ -16,7 +16,7 @@
 
 #include <event2/buffer.h>
 
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 #include "libtransmission/transmission.h"