diff --git a/recipes/openscenegraph/all/conandata.yml b/recipes/openscenegraph/all/conandata.yml
index 094e9853e6fca..c0b17a2382043 100644
--- a/recipes/openscenegraph/all/conandata.yml
+++ b/recipes/openscenegraph/all/conandata.yml
@@ -36,3 +36,9 @@ patches:
       patch_source:
         - https://github.com/openscenegraph/OpenSceneGraph/pull/1296
         - https://github.com/openscenegraph/OpenSceneGraph/pull/951
+    - patch_file: patches/0012-_FPOSOFF-deprecated.patch
+      patch_description: _FPOSOFF identifier not found
+      patch_type: bugfix
+      patch_source:
+        - https://github.com/openscenegraph/OpenSceneGraph/issues/1323
+        - https://github.com/microsoft/vcpkg/pull/38666/files
diff --git a/recipes/openscenegraph/all/patches/0012-_FPOSOFF-deprecated.patch b/recipes/openscenegraph/all/patches/0012-_FPOSOFF-deprecated.patch
new file mode 100644
index 0000000000000..7c5aa636e1022
--- /dev/null
+++ b/recipes/openscenegraph/all/patches/0012-_FPOSOFF-deprecated.patch
@@ -0,0 +1,13 @@
+diff --git a/src/osgPlugins/osga/OSGA_Archive.cpp b/src/osgPlugins/osga/OSGA_Archive.cpp
+index b9f518a..19186a7 100644
+--- a/src/osgPlugins/osga/OSGA_Archive.cpp
++++ b/src/osgPlugins/osga/OSGA_Archive.cpp
+@@ -77,7 +77,7 @@ inline OSGA_Archive::pos_type ARCHIVE_POS( const std::streampos & pos )
+ #else // older Dinkumware (eg: one included in Win Server 2003 Platform SDK )
+ 	fpos_t position = pos.get_fpos_t();
+ #endif
+-    std::streamoff offset = pos.operator std::streamoff( ) - _FPOSOFF( position );
++    std::streamoff offset = 0;
+
+     return OSGA_Archive::pos_type( position + offset );
+ }