diff --git a/configure.in b/configure.in
index 4e036b0d81..e8ab623d7f 100644
--- a/configure.in
+++ b/configure.in
@@ -403,14 +403,12 @@ if test x"$enable_core_pgsql_support" = x"yes" ; then
 AC_PATH_PROG([PG_CONFIG], [pg_config], [no])
 if test "$PG_CONFIG" != "no"; then
         AC_MSG_CHECKING([for PostgreSQL libraries])
-        POSTGRESQL_CFLAGS="`$PG_CONFIG --cflags` -I`$PG_CONFIG --includedir`"
         POSTGRESQL_CXXFLAGS="`$PG_CONFIG --cppflags` -I`$PG_CONFIG --includedir`"
         POSTGRESQL_LDFLAGS="`$PG_CONFIG --ldflags` -L`$PG_CONFIG --libdir` -lpq"
         POSTGRESQL_VERSION=`$PG_CONFIG --version | sed -e 's#PostgreSQL ##'`
         AC_DEFINE([SWITCH_HAVE_PGSQL], [1], [Define to 1 if PostgreSQL libraries are available])
 	AC_CHECK_LIB([pq], [PQgetvalue],, AC_MSG_ERROR([no usable libpq; please install PostgreSQL devel package or equivalent]))
         AC_MSG_RESULT([yes])
-	SWITCH_AM_CFLAGS="$POSTGRESQL_CFLAGS $SWITCH_AM_CFLAGS"
 	SWITCH_AM_CXXFLAGS="$POSTGRESQL_CXXFLAGS $SWITCH_AM_CXXFLAGS"
 	SWITCH_AM_LDFLAGS="$POSTGRESQL_LDFLAGS $SWITCH_AM_LDFLAGS"
 else