diff --git a/doc/ffms2-api.md b/doc/ffms2-api.md
index 571f849277..7dff082d11 100644
--- a/doc/ffms2-api.md
+++ b/doc/ffms2-api.md
@@ -129,9 +129,6 @@ int main (...) {
   /* now it's time to clean up */
   FFMS_DestroyVideoSource(videosource);
 
-  /* uninitialize the library. */
-  FFMS_Deinit();
-
   return 0;
 }
 ```
@@ -203,16 +200,6 @@ This argument is no longer used and is left only for API/ABI compatibility. Pass
 
 This argument is also no longer used and is left only for API/ABI compatibility. Pass 0.
 
-### FFMS_Deinit - deinitializes the library
-
-[Deinit]: ##ffms_deinit---deinitializes-the-library
-```c++
-void FFMS_Deinit()
-```
-Deinitializes the FFMS2 library.
-This function must be called once at the end of your program, and no more FFMS2 function calls must be made.
-This function is threadsafe and will only be run once.
-
 ### FFMS_GetLogLevel - gets FFmpeg message level
 
 [GetLogLevel]: #ffms_getloglevel---gets-ffmpeg-message-level
diff --git a/include/ffms.h b/include/ffms.h
index 586cc4ff6f..e3f150356d 100644
--- a/include/ffms.h
+++ b/include/ffms.h
@@ -419,7 +419,6 @@ typedef int (FFMS_CC *TIndexCallback)(int64_t Current, int64_t Total, void *ICPr
 /* Most functions return 0 on success */
 /* Functions without error message output can be assumed to never fail in a graceful way */
 FFMS_API(void) FFMS_Init(int, int); /* Pass 0 to both arguments, kept to partially preserve abi */
-FFMS_API(void) FFMS_Deinit();
 FFMS_API(int) FFMS_GetVersion();
 FFMS_API(int) FFMS_GetLogLevel();
 FFMS_API(void) FFMS_SetLogLevel(int Level);
diff --git a/src/core/ffms.cpp b/src/core/ffms.cpp
index 7572af120e..8ee6974d8e 100644
--- a/src/core/ffms.cpp
+++ b/src/core/ffms.cpp
@@ -87,10 +87,6 @@ FFMS_API(void) FFMS_Init(int, int) {
     });
 }
 
-FFMS_API(void) FFMS_Deinit() {
-
-}
-
 FFMS_API(int) FFMS_GetVersion() {
     return FFMS_VERSION;
 }
diff --git a/src/index/ffmsindex.cpp b/src/index/ffmsindex.cpp
index 9ff2fdae2e..1fa641bbcc 100644
--- a/src/index/ffmsindex.cpp
+++ b/src/index/ffmsindex.cpp
@@ -352,10 +352,8 @@ int main(int argc, const char *argv[]) {
         DoIndexing();
     } catch (Error const& e) {
         std::cout << e.msg << std::endl << std::flush;
-        FFMS_Deinit();
         return 1;
     }
 
-    FFMS_Deinit();
     return 0;
 }
diff --git a/src/vapoursynth/vapoursource4.cpp b/src/vapoursynth/vapoursource4.cpp
index be437fb60b..141ad0fa6d 100644
--- a/src/vapoursynth/vapoursource4.cpp
+++ b/src/vapoursynth/vapoursource4.cpp
@@ -243,7 +243,6 @@ const VSFrame *VS_CC VSVideoSource4::GetFrame(int n, int activationReason, void
 }
 
 void VS_CC VSVideoSource4::Free(void *instanceData, VSCore *, const VSAPI *) {
-    FFMS_Deinit();
     delete static_cast<VSVideoSource4 *>(instanceData);
 }
 
diff --git a/src/vapoursynth/vapoursynth4.cpp b/src/vapoursynth/vapoursynth4.cpp
index 8f8af0e554..a120690291 100644
--- a/src/vapoursynth/vapoursynth4.cpp
+++ b/src/vapoursynth/vapoursynth4.cpp
@@ -97,7 +97,6 @@ static void VS_CC CreateIndex(const VSMap *in, VSMap *out, void *, VSCore *, con
         FFMS_DestroyIndex(Index);
         vsapi->mapSetData(out, "result", "Valid index already exists", -1, dtUtf8, maReplace);
     }
-    FFMS_Deinit();
 }
 
 static void VS_CC CreateSource(const VSMap *in, VSMap *out, void *, VSCore *core, const VSAPI *vsapi) {
diff --git a/test/display_matrix.cpp b/test/display_matrix.cpp
index 866fb03831..ba2f4a9a09 100644
--- a/test/display_matrix.cpp
+++ b/test/display_matrix.cpp
@@ -45,7 +45,6 @@ void DisplayMatrixTest::SetUp() {
 void DisplayMatrixTest::TearDown() {
     FFMS_DestroyIndex(index);
     FFMS_DestroyVideoSource(video_source);
-    FFMS_Deinit();
 }
 
 bool DisplayMatrixTest::DoIndexing(std::string file_name) {
diff --git a/test/hdr.cpp b/test/hdr.cpp
index f3f803649e..157285ef07 100644
--- a/test/hdr.cpp
+++ b/test/hdr.cpp
@@ -76,7 +76,6 @@ void HDR10Test::SetUp() {
 void HDR10Test::TearDown() {
     FFMS_DestroyIndex(index);
     FFMS_DestroyVideoSource(video_source);
-    FFMS_Deinit();
 }
 
 bool HDR10Test::DoIndexing(std::string file_name) {
diff --git a/test/indexer.cpp b/test/indexer.cpp
index b70d53f426..c996e8f080 100644
--- a/test/indexer.cpp
+++ b/test/indexer.cpp
@@ -71,7 +71,6 @@ void IndexerTest::SetUp() {
 void IndexerTest::TearDown() {
     FFMS_DestroyIndex(index);
     FFMS_DestroyVideoSource(video_source);
-    FFMS_Deinit();
 }
 
 bool IndexerTest::DoIndexing(std::string file_name) {