diff --git a/src/enc/config.c b/src/enc/config.c
index f346b0e6..53a3bb2e 100644
--- a/src/enc/config.c
+++ b/src/enc/config.c
@@ -111,7 +111,11 @@ int WebPValidateConfig(const WebPConfig* config) {
     return 0;
   if (config->show_compressed < 0 || config->show_compressed > 1)
     return 0;
+#if WEBP_ENCODER_ABI_VERSION > 0x0204
   if (config->preprocessing < 0 || config->preprocessing > 7)
+#else
+  if (config->preprocessing < 0 || config->preprocessing > 3)
+#endif
     return 0;
   if (config->partitions < 0 || config->partitions > 3)
     return 0;
diff --git a/src/enc/picture_csp.c b/src/enc/picture_csp.c
index e18f1096..7875f625 100644
--- a/src/enc/picture_csp.c
+++ b/src/enc/picture_csp.c
@@ -978,9 +978,11 @@ int WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace) {
   return PictureARGBToYUVA(picture, colorspace, 0.f, 0);
 }
 
+#if WEBP_ENCODER_ABI_VERSION > 0x0204
 int WebPPictureSmartARGBToYUVA(WebPPicture* picture) {
   return PictureARGBToYUVA(picture, WEBP_YUV420, 0.f, 1);
 }
+#endif
 
 //------------------------------------------------------------------------------
 // call for YUVA -> ARGB conversion
diff --git a/src/enc/webpenc.c b/src/enc/webpenc.c
index 090f14c5..0cb83f12 100644
--- a/src/enc/webpenc.c
+++ b/src/enc/webpenc.c
@@ -329,9 +329,11 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) {
     if (pic->y == NULL || pic->u == NULL || pic->v == NULL) {
       // Make sure we have YUVA samples.
       if (config->preprocessing & 4) {
+#if WEBP_ENCODER_ABI_VERSION > 0x0204
         if (!WebPPictureSmartARGBToYUVA(pic)) {
           return 0;
         }
+#endif
       } else {
         float dithering = 0.f;
         if (config->preprocessing & 2) {
diff --git a/src/webp/encode.h b/src/webp/encode.h
index 59ce0d2b..3c263748 100644
--- a/src/webp/encode.h
+++ b/src/webp/encode.h
@@ -462,12 +462,14 @@ WEBP_EXTERN(int) WebPPictureARGBToYUVA(WebPPicture* picture,
 WEBP_EXTERN(int) WebPPictureARGBToYUVADithered(
     WebPPicture* picture, WebPEncCSP colorspace, float dithering);
 
+#if WEBP_ENCODER_ABI_VERSION > 0x0204
 // Performs 'smart' RGBA->YUVA420 downsampling and colorspace conversion.
 // Downsampling is handled with extra care in case of color clipping. This
 // method is roughly 2x slower than WebPPictureARGBToYUVA() but produces better
 // YUV representation.
 // Returns false in case of error.
 WEBP_EXTERN(int) WebPPictureSmartARGBToYUVA(WebPPicture* picture);
+#endif
 
 // Converts picture->yuv to picture->argb and sets picture->use_argb to true.
 // The input format must be YUV_420 or YUV_420A.