diff --git a/FFmpegSource2/indexing.cpp b/FFmpegSource2/indexing.cpp
index aba8641fb..14af03a14 100644
--- a/FFmpegSource2/indexing.cpp
+++ b/FFmpegSource2/indexing.cpp
@@ -27,11 +27,6 @@
 #include "indexing.h"
 #include "wave64writer.h"
 
-#ifndef WIN32
-#	define _ftelli64 ftello
-#	define _fseeki64 fseeko
-#endif
-
 class AudioContext {
 public:
 	Wave64Writer *W64W;
diff --git a/FFmpegSource2/stdiostream.c b/FFmpegSource2/stdiostream.c
index f1966b30a..68c2f2f73 100644
--- a/FFmpegSource2/stdiostream.c
+++ b/FFmpegSource2/stdiostream.c
@@ -20,11 +20,6 @@
 
 #include "stdiostream.h"
 
-#ifndef WIN32
-#	define _ftelli64 ftello
-#	define _fseeki64 fseeko
-#endif
-
 /* StdIoStream methods */
 
 /* read count bytes into buffer starting at file position pos
diff --git a/FFmpegSource2/utils.cpp b/FFmpegSource2/utils.cpp
index 3c382db06..abd1b9cee 100644
--- a/FFmpegSource2/utils.cpp
+++ b/FFmpegSource2/utils.cpp
@@ -22,11 +22,6 @@
 #include <string.h>
 #include <intrin.h>
 
-#ifndef WIN32
-#	define _ftelli64 ftello
-#	define _fseeki64 fseeko
-#endif
-
 int GetCPUFlags() {
 	int CPUInfo[4];
 	__cpuid(CPUInfo, 0);