diff --git a/libraries/liblmdb/CHANGES b/libraries/liblmdb/CHANGES
index 0d18ac1189..2b326350b8 100644
--- a/libraries/liblmdb/CHANGES
+++ b/libraries/liblmdb/CHANGES
@@ -1,6 +1,6 @@
 LMDB 0.9 Change Log
 
-LMDB 0.9.34 Engineering
+LMDB 0.9.34 Release (2026/01/26)
 	ITS#9564 - fix race condition freeing spilled pages at end of transaction
 	ITS#10222 - Update mdb_dump(1) and mdb_load(1) man pages for append (-a) option
 	ITS#10275 - mdb_load: add -Q option to use NOSYNC
@@ -9,6 +9,8 @@ LMDB 0.9.34 Engineering
 	ITS#10346 - fix mdb_env_copy2 with values > (2GB-16)
 	ITS#10355 - fix mplay build on musl
 	ITS#10396 - fix mdb_cursor_del0 with multiple DUPSORT cursors
+	ITS#10419 - add support for NetBSD
+	ITS#10420 - add support for Haiku
 	ITS#10421 - mdb_load: check for malicious input
 
 LMDB 0.9.33 Release (2024/05/21)
diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index 199382a14c..a206cf756d 100644
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -200,7 +200,7 @@ typedef int mdb_filehandle_t;
 /** Library minor version */
 #define MDB_VERSION_MINOR	9
 /** Library patch version */
-#define MDB_VERSION_PATCH	33
+#define MDB_VERSION_PATCH	34
 
 /** Combine args a,b,c into a single integer for easy version comparisons */
 #define MDB_VERINT(a,b,c)	(((a) << 24) | ((b) << 16) | (c))
@@ -210,7 +210,7 @@ typedef int mdb_filehandle_t;
 	MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)
 
 /** The release date of this library version */
-#define MDB_VERSION_DATE	"May 21, 2024"
+#define MDB_VERSION_DATE	"Jan 26, 2026"
 
 /** A stringifier for the version info */
 #define MDB_VERSTR(a,b,c,d)	"LMDB " #a "." #b "." #c ": (" d ")"
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index a6b5375c00..1cec612013 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -135,6 +135,14 @@ typedef SSIZE_T	ssize_t;
 # endif
 #elif defined(ANDROID)
 # define MDB_FDATASYNC		fsync
+#elif defined(__HAIKU__)
+# define MDB_USE_POSIX_SEM	1
+# define MDB_FDATASYNC		fsync
+#endif
+
+/* NetBSD does not define union semun in sys/sem.h */
+#if defined(__NetBSD__) && !defined(_SEM_SEMUN_UNDEFINED)
+# define _SEM_SEMUN_UNDEFINED  1
 #endif
 
 #ifndef _WIN32