diff --git a/configure b/configure
index f2304f6..6b4235c 100755
--- a/configure
+++ b/configure
@@ -5180,7 +5180,7 @@
 BUILDDIR="`pwd`"
 
 
-if test "$srcdir" != "$BUILDDIR"; then
+if test "$srcdir" != "." -a "$srcdir" != "$BUILDDIR"; then
     # If we're building out-of-tree make sure Include (in the current dir)
     # gets picked up before its $srcdir counterpart in order for Python-ast.h
     # and graminit.h to get picked up from the correct directory.
diff --git a/configure.ac b/configure.ac
index 094e5a4..6f8ed74 100644
--- a/configure.ac
+++ b/configure.ac
@@ -857,7 +857,7 @@
 BUILDDIR="`pwd`"
 AC_SUBST(BUILDDIR)
 AC_SUBST(BASECPPFLAGS)
-if test "$srcdir" != "$BUILDDIR"; then
+if test "$srcdir" != "." -a "$srcdir" != "$BUILDDIR"; then
     # If we're building out-of-tree make sure Include (in the current dir)
     # gets picked up before its $srcdir counterpart in order for Python-ast.h
     # and graminit.h to get picked up from the correct directory.