diff --git a/include/__config b/include/__config
index 4a8fef83b..5b3c6947c 100644
--- a/include/__config
+++ b/include/__config
@@ -908,15 +908,6 @@ extern "C" void __sanitizer_annotate_contiguous_container(
 #define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF
 #endif
 
-extern "C++" {
-_LIBCPP_BEGIN_NAMESPACE_STD
-_LIBCPP_FUNC_VIS _LIBCPP_WEAK  int __libcpp_library_version();
-_LIBCPP_END_NAMESPACE_STD
-}
-
-#define _LIBCPP_LIBRARY_VERSION \
- (_VSTD::__libcpp_library_version ? _VSTD::__libcpp_library_version() : -1)
-
 #endif // __cplusplus
 
 #endif // _LIBCPP_CONFIG
diff --git a/lib/abi/CHANGELOG.TXT b/lib/abi/CHANGELOG.TXT
index 729a6a654..e71f09273 100644
--- a/lib/abi/CHANGELOG.TXT
+++ b/lib/abi/CHANGELOG.TXT
@@ -16,11 +16,6 @@ New entries should be added directly below the "Version" header.
 Version 4.0
 -----------
 
-* r285382 - Add __libcpp_library_version
-
-  all platforms
-  -------------
-  Symbol added: _ZNSt3__124__libcpp_library_versionEv
 
 * r285101 - Add -fvisibility-inlines-hidden when building libc++.
 
diff --git a/lib/abi/x86_64-apple-darwin16.0.abilist b/lib/abi/x86_64-apple-darwin16.0.abilist
index cd26311b1..d334aed16 100644
--- a/lib/abi/x86_64-apple-darwin16.0.abilist
+++ b/lib/abi/x86_64-apple-darwin16.0.abilist
@@ -1213,7 +1213,6 @@
 {'type': 'FUNC', 'name': '__ZNSt3__121recursive_timed_mutexD1Ev'}
 {'type': 'FUNC', 'name': '__ZNSt3__121recursive_timed_mutexD2Ev'}
 {'type': 'FUNC', 'name': '__ZNSt3__121undeclare_no_pointersEPcm'}
-{'type': 'FUNC', 'name': '__ZNSt3__124__libcpp_library_versionEv'}
 {'type': 'FUNC', 'name': '__ZNSt3__125notify_all_at_thread_exitERNS_18condition_variableENS_11unique_lockINS_5mutexEEE'}
 {'type': 'FUNC', 'name': '__ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIaaEEPaEEbT0_S5_T_'}
 {'type': 'FUNC', 'name': '__ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIccEEPcEEbT0_S5_T_'}
diff --git a/lib/abi/x86_64-linux-gnu.abilist b/lib/abi/x86_64-linux-gnu.abilist
index fd03c6841..b6e7ce4c0 100644
--- a/lib/abi/x86_64-linux-gnu.abilist
+++ b/lib/abi/x86_64-linux-gnu.abilist
@@ -1141,7 +1141,6 @@
 {'type': 'FUNC', 'name': '_ZNSt3__121recursive_timed_mutexD1Ev'}
 {'type': 'FUNC', 'name': '_ZNSt3__121recursive_timed_mutexD2Ev'}
 {'type': 'FUNC', 'name': '_ZNSt3__121undeclare_no_pointersEPcm'}
-{'type': 'FUNC', 'name': '_ZNSt3__124__libcpp_library_versionEv'}
 {'type': 'FUNC', 'name': '_ZNSt3__125__num_get_signed_integralIlEET_PKcS3_Rji'}
 {'type': 'FUNC', 'name': '_ZNSt3__125__num_get_signed_integralIxEET_PKcS3_Rji'}
 {'type': 'FUNC', 'name': '_ZNSt3__125notify_all_at_thread_exitERNS_18condition_variableENS_11unique_lockINS_5mutexEEE'}