diff --git a/configure b/configure
index 7cdb13d..93f2e0e 100755
--- a/configure
+++ b/configure
@@ -8465,7 +8465,30 @@ if test "x$ac_cv_header_turbojpeg_h" = xyes
 then :
 
 else case e in #(
-  e) Can not find libturbojpeg0 headers file. ;;
+  e) as_fn_error $? "Can not find libturbojpeg0 headers file." "$LINENO" 5 ;;
+esac
+fi
+
+
+CFLAGS=`sdl2-config --cflags`
+
+
+ac_fn_c_check_header_compile "$LINENO" "SDL.h" "ac_cv_header_SDL_h" "$ac_includes_default"
+if test "x$ac_cv_header_SDL_h" = xyes
+then :
+
+else case e in #(
+  e) as_fn_error $? "Can not find SDL headers file." "$LINENO" 5 ;;
+esac
+fi
+
+
+ac_fn_c_check_header_compile "$LINENO" "SDL_ttf.h" "ac_cv_header_SDL_ttf_h" "$ac_includes_default"
+if test "x$ac_cv_header_SDL_ttf_h" = xyes
+then :
+
+else case e in #(
+  e) as_fn_error $? "Can not find sdl ttf header file." "$LINENO" 5 ;;
 esac
 fi
 
diff --git a/configure.ac b/configure.ac
index f0848b6..49d2e24 100644
--- a/configure.ac
+++ b/configure.ac
@@ -182,7 +182,13 @@ AC_CHECK_LIB([SDL2_ttf], [TTF_Init], [], AC_MSG_ERROR([Can not find libsdl ttf.]
 
 dnl check headers
 
-AC_CHECK_HEADER([turbojpeg.h], [], [Can not find libturbojpeg0 headers file.], [])
+AC_CHECK_HEADER([turbojpeg.h], [], AC_MSG_ERROR([Can not find libturbojpeg0 headers file.]), [])
+
+AC_SUBST([CFLAGS], [`sdl2-config --cflags`])
+
+AC_CHECK_HEADER([SDL.h], [], AC_MSG_ERROR([Can not find SDL headers file.]), [])
+
+AC_CHECK_HEADER([SDL_ttf.h], [], AC_MSG_ERROR([Can not find sdl ttf header file.]), [])
 
 AC_CONFIG_FILES([Makefile quick_quicklisp.sh po/Makefile.in src/config.lisp.in])