diff --git a/contrib/pngminim/decoder/pngusr.h b/contrib/pngminim/decoder/pngusr.h
index 74b97b81..e4e3b19f 100644
--- a/contrib/pngminim/decoder/pngusr.h
+++ b/contrib/pngminim/decoder/pngusr.h
@@ -30,6 +30,7 @@
 #define PNG_NO_READ_PACK
 #define PNG_NO_READ_PACKSWAP
 #define PNG_NO_READ_FILLER
+#define PNG_NO_READ_SWAP
 #define PNG_NO_READ_SWAP_ALPHA
 #define PNG_NO_READ_INVERT_ALPHA
 #define PNG_NO_READ_RGB_TO_GRAY
diff --git a/contrib/pngminim/encoder/pngusr.h b/contrib/pngminim/encoder/pngusr.h
index 7c1627c7..65953c6a 100644
--- a/contrib/pngminim/encoder/pngusr.h
+++ b/contrib/pngminim/encoder/pngusr.h
@@ -26,6 +26,7 @@
 #define PNG_NO_WRITE_PACK
 #define PNG_NO_WRITE_PACKSWAP
 #define PNG_NO_WRITE_FILLER
+#define PNG_NO_WRITE_SWAP
 #define PNG_NO_WRITE_SWAP_ALPHA
 #define PNG_NO_WRITE_INVERT_ALPHA
 #define PNG_NO_WRITE_RGB_TO_GRAY
diff --git a/contrib/pngminim/preader/pngusr.h b/contrib/pngminim/preader/pngusr.h
index 518c0ef5..f3b0038e 100644
--- a/contrib/pngminim/preader/pngusr.h
+++ b/contrib/pngminim/preader/pngusr.h
@@ -24,6 +24,7 @@
 #define PNG_NO_READ_PACK
 #define PNG_NO_READ_PACKSWAP
 #define PNG_NO_READ_FILLER
+#define PNG_NO_READ_SWAP
 #define PNG_NO_READ_SWAP_ALPHA
 #define PNG_NO_READ_INVERT_ALPHA
 #define PNG_NO_READ_RGB_TO_GRAY