diff --git a/pnglibconf.h b/pnglibconf.h
index 3758bcf..d4b04cd 100644
--- a/pnglibconf.h
+++ b/pnglibconf.h
@@ -19,6 +19,7 @@
 #define PNG_BENIGN_READ_ERRORS_SUPPORTED
 /*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/
 #define PNG_COLORSPACE_SUPPORTED
+#define PNG_CONVERT_tIME_SUPPORTED
 #define PNG_EASY_ACCESS_SUPPORTED
 /*#undef PNG_ERROR_NUMBERS_SUPPORTED*/
 #define PNG_ERROR_TEXT_SUPPORTED
@@ -120,12 +121,14 @@
 #define PNG_WRITE_tEXt_SUPPORTED
 #define PNG_WRITE_tRNS_SUPPORTED
 #define PNG_WRITE_zTXt_SUPPORTED
+#define PNG_bKGD_SUPPORTED
 #define PNG_cHRM_SUPPORTED
 #define PNG_gAMA_SUPPORTED
 #define PNG_iCCP_SUPPORTED
 #define PNG_sBIT_SUPPORTED
 #define PNG_sRGB_SUPPORTED
 #define PNG_tEXt_SUPPORTED
+#define PNG_tIME_SUPPORTED
 #define PNG_tRNS_SUPPORTED
 #define PNG_zTXt_SUPPORTED
 /* end of options */
@@ -134,7 +137,6 @@
 /*#undef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED*/
 /*#undef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED*/
 /*#undef PNG_CONSOLE_IO_SUPPORTED*/
-/*#undef PNG_CONVERT_tIME_SUPPORTED*/
 /*#undef PNG_GET_PALETTE_MAX_SUPPORTED*/
 /*#undef PNG_INCH_CONVERSIONS_SUPPORTED*/
 /*#undef PNG_IO_STATE_SUPPORTED*/
@@ -172,7 +174,6 @@
 /*#undef PNG_WRITE_sCAL_SUPPORTED*/
 /*#undef PNG_WRITE_sPLT_SUPPORTED*/
 /*#undef PNG_WRITE_tIME_SUPPORTED*/
-/*#undef PNG_bKGD_SUPPORTED*/
 /*#undef PNG_hIST_SUPPORTED*/
 /*#undef PNG_iTXt_SUPPORTED*/
 /*#undef PNG_oFFs_SUPPORTED*/
@@ -180,7 +181,6 @@
 /*#undef PNG_pHYs_SUPPORTED*/
 /*#undef PNG_sCAL_SUPPORTED*/
 /*#undef PNG_sPLT_SUPPORTED*/
-/*#undef PNG_tIME_SUPPORTED*/
 /* end of chromium options */
 /* default settings */
 /* These are PNG settings that match the default in scripts/pnglibconf.dfa */