diff --git a/src/MtpLocalFileCopy.cpp b/src/MtpLocalFileCopy.cpp
index b06efa3..bcf863b 100644
--- a/src/MtpLocalFileCopy.cpp
+++ b/src/MtpLocalFileCopy.cpp
@@ -85,9 +85,9 @@ off_t MtpLocalFileCopy::getSize()
 	return tempInfo.st_size;
 }
 
-void MtpLocalFileCopy::seek(long offset)
+void MtpLocalFileCopy::seek(off_t offset)
 {
-	if (fseek(m_localFile, offset, SEEK_SET))
+	if (fseeko(m_localFile, offset, SEEK_SET))
 		throw MtpFilesystemErrorWithErrorCode(errno, "seek failed");
 }
 
diff --git a/src/MtpLocalFileCopy.h b/src/MtpLocalFileCopy.h
index 1ceefc2..1d4740f 100644
--- a/src/MtpLocalFileCopy.h
+++ b/src/MtpLocalFileCopy.h
@@ -39,7 +39,7 @@ class MtpLocalFileCopy
 
 	off_t getSize();
 
-	void seek(long offset);
+	void seek(off_t offset);
 	size_t write(const void* ptr, size_t size);
 	void truncate(off_t length);
 	size_t read(void* ptr, size_t size);