diff --git a/src/common/io_file.cpp b/src/common/io_file.cpp
index eeacbc393..6fa9062a7 100644
--- a/src/common/io_file.cpp
+++ b/src/common/io_file.cpp
@@ -330,7 +330,7 @@ bool IOFile::Commit() const {
     return commit_result;
 }
 
-bool IOFile::SetSize(const char* host_path, u64 size) const {
+bool IOFile::SetSize(u64 size) const {
     if (!IsOpen()) {
         return false;
     }
@@ -340,7 +340,7 @@ bool IOFile::SetSize(const char* host_path, u64 size) const {
 #ifdef _WIN32
     const auto set_size_result = _chsize_s(fileno(file), static_cast<s64>(size)) == 0;
 #else
-    const auto set_size_result = truncate(host_path, static_cast<s64>(size)) == 0;
+    const auto set_size_result = ftruncate(fileno(file), static_cast<s64>(size)) == 0;
 #endif
 
     if (!set_size_result) {
diff --git a/src/common/io_file.h b/src/common/io_file.h
index 87174969d..45787a092 100644
--- a/src/common/io_file.h
+++ b/src/common/io_file.h
@@ -114,7 +114,7 @@ public:
     bool Flush() const;
     bool Commit() const;
 
-    bool SetSize(const char* host_path, u64 size) const;
+    bool SetSize(u64 size) const;
     u64 GetSize() const;
 
     bool Seek(s64 offset, SeekOrigin origin = SeekOrigin::SetOrigin) const;
diff --git a/src/core/libraries/kernel/file_system.cpp b/src/core/libraries/kernel/file_system.cpp
index 67433c793..cb1fd14a2 100644
--- a/src/core/libraries/kernel/file_system.cpp
+++ b/src/core/libraries/kernel/file_system.cpp
@@ -181,7 +181,7 @@ s32 PS4_SYSV_ABI open(const char* raw_path, s32 flags, u16 mode) {
             return -1;
         }
     } else {
-        // Start by opening as read-write so we can truncate on all platforms.
+        // Start by opening as read-write so we can truncate regardless of flags.
         // Since open starts by closing the file, this won't interfere with later open calls.
         e = file->f.Open(file->m_host_name, Common::FS::FileAccessMode::ReadWrite);
 
@@ -194,7 +194,7 @@ s32 PS4_SYSV_ABI open(const char* raw_path, s32 flags, u16 mode) {
             return -1;
         } else if (truncate && e == 0) {
             // If the file was opened successfully and truncate was enabled, reduce size to 0
-            file->f.SetSize(file->m_host_name.string().c_str(), 0);
+            file->f.SetSize(0);
         }
 
         if (read) {
@@ -705,7 +705,7 @@ s32 PS4_SYSV_ABI posix_ftruncate(s32 fd, s64 length) {
         return -1;
     }
 
-    file->f.SetSize(file->m_host_name.string().c_str(), length);
+    file->f.SetSize(length);
     return ORBIS_OK;
 }