diff --git a/Source/VFS/source/NetFTP/File.cpp b/Source/VFS/source/NetFTP/File.cpp
index 19420d052..40550e13a 100644
--- a/Source/VFS/source/NetFTP/File.cpp
+++ b/Source/VFS/source/NetFTP/File.cpp
@@ -370,7 +370,7 @@ void File::FinishReading()
     assert(m_Mode == Mode::Read);
 
     // tell curl to cancel any going reading if any
-    m_CURL->prog_func = ^(double, double, double, double) {
+    m_CURL->prog_func = ^(curl_off_t, curl_off_t, curl_off_t, curl_off_t) {
       return 1;
     };
 
diff --git a/Source/VFS/source/NetFTP/Host.cpp b/Source/VFS/source/NetFTP/Host.cpp
index 4f067a3b6..214b21845 100644
--- a/Source/VFS/source/NetFTP/Host.cpp
+++ b/Source/VFS/source/NetFTP/Host.cpp
@@ -172,7 +172,7 @@ int FTPHost::DownloadListing(CURLInstance *_inst,
     _inst->EasySetOpt(CURLOPT_WRITEFUNCTION, CURLWriteDataIntoString);
     _inst->EasySetOpt(CURLOPT_WRITEDATA, &response);
     _inst->EasySetupProgFunc();
-    _inst->prog_func = ^(double, double, double, double) {
+    _inst->prog_func = ^(curl_off_t, curl_off_t, curl_off_t, curl_off_t) {
       if( _cancel_checker == nil )
           return 0;
       return _cancel_checker() ? 1 : 0;
diff --git a/Source/VFS/source/NetFTP/Internals.cpp b/Source/VFS/source/NetFTP/Internals.cpp
index 2ab336ce6..ae1dc22da 100644
--- a/Source/VFS/source/NetFTP/Internals.cpp
+++ b/Source/VFS/source/NetFTP/Internals.cpp
@@ -273,7 +273,11 @@ CURLMcode CURLInstance::Detach()
     return e;
 }
 
-int CURLInstance::ProgressCallback(void *clientp, double dltotal, double dlnow, double ultotal, double ulnow)
+int CURLInstance::ProgressCallback(void *clientp,
+                                   curl_off_t dltotal,
+                                   curl_off_t dlnow,
+                                   curl_off_t ultotal,
+                                   curl_off_t ulnow)
 {
     CURLInstance *_this = static_cast<CURLInstance *>(clientp);
     return _this->prog_func ? _this->prog_func(dltotal, dlnow, ultotal, ulnow) : 0;
@@ -281,7 +285,7 @@ int CURLInstance::ProgressCallback(void *clientp, double dltotal, double dlnow,
 
 void CURLInstance::EasySetupProgFunc()
 {
-    EasySetOpt(CURLOPT_PROGRESSFUNCTION, ProgressCallback);
+    EasySetOpt(CURLOPT_XFERINFOFUNCTION, ProgressCallback);
     EasySetOpt(CURLOPT_PROGRESSDATA, this);
     EasySetOpt(CURLOPT_NOPROGRESS, 0);
     prog_func = nil;
@@ -289,7 +293,7 @@ void CURLInstance::EasySetupProgFunc()
 
 void CURLInstance::EasyClearProgFunc()
 {
-    EasySetOpt(CURLOPT_PROGRESSFUNCTION, nullptr);
+    EasySetOpt(CURLOPT_XFERINFOFUNCTION, nullptr);
     EasySetOpt(CURLOPT_PROGRESSDATA, nullptr);
     EasySetOpt(CURLOPT_NOPROGRESS, 1);
     prog_func = nil;
diff --git a/Source/VFS/source/NetFTP/Internals.h b/Source/VFS/source/NetFTP/Internals.h
index 73fb2204f..8e69d269c 100644
--- a/Source/VFS/source/NetFTP/Internals.h
+++ b/Source/VFS/source/NetFTP/Internals.h
@@ -44,11 +44,12 @@ struct CURLInstance {
     CURL *curl = nullptr;
     CURLM *curlm = nullptr;
     bool attached = false;
-    int (^prog_func)(double dltotal, double dlnow, double ultotal, double ulnow) = nil;
+    int (^prog_func)(curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) = nil;
     std::mutex call_lock;
 
 private:
-    static int ProgressCallback(void *clientp, double dltotal, double dlnow, double ultotal, double ulnow);
+    static int
+    ProgressCallback(void *clientp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
 };
 
 // ReadBuffer provides an intermediatery storage where CURL can write to so that a File can read from afterwards