diff --git a/png.h b/png.h
index 851db0af5..e5693e364 100644
--- a/png.h
+++ b/png.h
@@ -2008,11 +2008,9 @@ PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr,
     png_inforp info_ptr, png_bytepp row_pointers));
 #endif
 
-#ifdef PNG_READ_SUPPORTED
 /* Returns number of color channels in image. */
 PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr,
     png_const_inforp info_ptr));
-#endif
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
 /* Returns image width in pixels. */
diff --git a/pngget.c b/pngget.c
index e33afcf2f..f92172385 100644
--- a/pngget.c
+++ b/pngget.c
@@ -423,7 +423,6 @@ png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr,
 #endif  /* PNG_EASY_ACCESS_SUPPORTED */
 
 
-#ifdef PNG_READ_SUPPORTED
 png_byte PNGAPI
 png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
@@ -433,6 +432,7 @@ png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr)
    return (0);
 }
 
+#ifdef PNG_READ_SUPPORTED
 png_const_bytep PNGAPI
 png_get_signature(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
diff --git a/pnginfo.h b/pnginfo.h
index 6d196ae69..6bf179531 100644
--- a/pnginfo.h
+++ b/pnginfo.h
@@ -73,7 +73,10 @@ struct png_info_def
    png_byte channels;       /* number of data channels per pixel (1, 2, 3, 4) */
    png_byte pixel_depth;    /* number of bits per pixel */
    png_byte spare_byte;     /* to align the data, and for future use */
+
+#ifdef PNG_READ_SUPPORTED
    png_byte signature[8];   /* magic bytes read by libpng from start of file */
+#endif
 
    /* The rest of the data is optional.  If you are reading, check the
     * valid field to see if the information in these are valid.  If you