diff --git a/ANNOUNCE b/ANNOUNCE
index 7e79487..99b0c50 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -103,6 +103,7 @@
     enables that fix for all compilers when using compile-time constants.
     Under MSYS 'byte' is a name declared in a system header file, so we
     changed the name of a local variable to avoid the warnings that result.
+  Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h
 
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diff --git a/CHANGES b/CHANGES
index 4d5aa2c..0f8d8b6 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3664,6 +3664,7 @@
     enables that fix for all compilers when using compile-time constants.
     Under MSYS 'byte' is a name declared in a system header file, so we
     changed the name of a local variable to avoid the warnings that result.
+  Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/contrib/pngminim/decoder/pngusr.h b/contrib/pngminim/decoder/pngusr.h
index ce85537..9d9c50c 100644
--- a/contrib/pngminim/decoder/pngusr.h
+++ b/contrib/pngminim/decoder/pngusr.h
@@ -19,5 +19,6 @@
  */
 
 #define PNG_NO_WARNINGS
+#define PNG_ALIGN_TYPE PNG_ALIGN_NONE
 
 #endif /* MINRDPNGCONF_H */
diff --git a/contrib/pngminim/encoder/pngusr.h b/contrib/pngminim/encoder/pngusr.h
index fb35245..2033aad 100644
--- a/contrib/pngminim/encoder/pngusr.h
+++ b/contrib/pngminim/encoder/pngusr.h
@@ -19,5 +19,6 @@
  */
 
 #define PNG_NO_WARNINGS
+#define PNG_ALIGN_TYPE PNG_ALIGN_NONE
 
 #endif /* MINWRPNGCONF_H */
diff --git a/contrib/pngminim/preader/pngusr.h b/contrib/pngminim/preader/pngusr.h
index b40cc46..73cfecf 100644
--- a/contrib/pngminim/preader/pngusr.h
+++ b/contrib/pngminim/preader/pngusr.h
@@ -19,5 +19,6 @@
  */
 
 #define PNG_NO_WARNINGS
+#define PNG_ALIGN_TYPE PNG_ALIGN_NONE
 
 #endif /* MINPRDPNGCONF_H */