diff --git a/ANNOUNCE b/ANNOUNCE
index b90fc0256..4e63ed95a 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,4 +1,4 @@
-Libpng 1.6.30beta03 - April 23, 2017
+Libpng 1.6.30beta03 - May 16, 2017
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -38,8 +38,9 @@ Version 1.6.30beta02 [April 22, 2017]
     example.c, and in the manual (suggested by Jaeseung Choi).
   Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation.
 
-Version 1.6.30beta03 [April 23, 2017]
+Version 1.6.30beta03 [May 16, 2017]
   Check for integer overflow in contrib/visupng and contrib/tools/genpng.
+  Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 883062c23..382161bc1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5833,8 +5833,9 @@ Version 1.6.30beta02 [April 22, 2017]
     example.c, and in the manual (suggested by Jaeseung Choi).
   Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation.
 
-Version 1.6.30beta03 [April 23, 2017]
+Version 1.6.30beta03 [May 16, 2017]
   Check for integer overflow in contrib/visupng and contrib/tools/genpng.
+  Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6338163f2..191e85404 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,8 +80,8 @@ set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names")
 set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings")
 
 # set definitions and sources for arm
-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^arm" OR
-  ${CMAKE_SYSTEM_PROCESSOR} MATCHES "^aarch64")
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR
+  CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
   set(PNG_ARM_NEON_POSSIBLE_VALUES check on off)
   set(PNG_ARM_NEON "check" CACHE STRING "Enable ARM NEON optimizations:
      check: (default) use internal checking code;
@@ -110,8 +110,8 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^arm" OR
 endif()
 
 # set definitions and sources for powerpc
-if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^powerpc*" OR
-	${CMAKE_SYSTEM_PROCESSOR} MATCHES "^ppc64*" )
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR
+	CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*" )
   set(PNG_POWERPC_VSX_POSSIBLE_VALUES check on off)
   set(PNG_POWERPC_VSX "check" CACHE STRING "Enable POWERPC VSX optimizations:
      check: (default) use internal checking code;