--- config.h.in
+++ config.h.in
@@ -3,6 +3,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define to 1 if you have the <errno.h> header file. */
+#undef HAVE_ERRNO_H
+
 /* Define to 1 if you have the `fdatasync' function. */
 #undef HAVE_FDATASYNC
 
--- configure
+++ configure
@@ -11991,7 +11991,8 @@
 
 
 
-for ac_header in sys/types.h stdlib.h stdint.h inttypes.h malloc.h
+
+for ac_header in sys/types.h stdlib.h stdint.h inttypes.h malloc.h errno.h
 do
 as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
--- configure.ac
+++ configure.ac
@@ -122,7 +122,7 @@
 
 #########
 # Check for needed/wanted headers
-AC_CHECK_HEADERS([sys/types.h stdlib.h stdint.h inttypes.h malloc.h])
+AC_CHECK_HEADERS([sys/types.h stdlib.h stdint.h inttypes.h malloc.h errno.h])
 
 #########
 # Figure out whether or not we have these functions
--- src/sqliteInt.h
+++ src/sqliteInt.h
@@ -80,6 +80,9 @@
 #ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
 #endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
 
 /*
 ** The following macros are used to cast pointers to integers and