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-rw-r--r--doc/src/sgml/extend.sgml2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/src/sgml/extend.sgml b/doc/src/sgml/extend.sgml
index d3b93dbe347..737a0d7f4dc 100644
--- a/doc/src/sgml/extend.sgml
+++ b/doc/src/sgml/extend.sgml
@@ -320,7 +320,7 @@
<listitem>
<para>
If calling backend functions from C++ code, be sure that the
- C++ call stack contains only plain old data structure
+ C++ call stack contains only plain old data structures
(<acronym>POD</>). This is necessary because backend errors
generate a distant <function>longjump()</> that does not properly
unroll a C++ call stack with non-POD objects.