diff --git a/ChangeLog.md b/ChangeLog.md
index ff40d4bf..37379518 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -56,7 +56,7 @@ using the `tjLoadImage()` function.
 decompress a specially-crafted malformed JPEG image to a 256-color BMP using
 djpeg.
 
-4. Fixed a floating-point exception that occurred when attempting to
+4. Fixed a floating point exception that occurred when attempting to
 decompress a specially-crafted malformed JPEG image with a specified image
 width or height of 0 using the C version of TJBench.
 
diff --git a/appveyor.yml b/appveyor.yml
index f3bf8b1c..cee15e91 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,10 +1,10 @@
 install:
   - cmd: >-
-      mkdir c:\installers
+      if not exist c:\installers mkdir c:\installers
 
       mkdir c:\temp
 
-      curl -fSL -o c:\installers\nasm-2.10.01-win32.zip http://www.nasm.us/pub/nasm/releasebuilds/2.10.01/win32/nasm-2.10.01-win32.zip
+      if not exist c:\installers\nasm-2.10.01-win32.zip curl -fSL -o c:\installers\nasm-2.10.01-win32.zip http://www.nasm.us/pub/nasm/releasebuilds/2.10.01/win32/nasm-2.10.01-win32.zip
 
       7z x c:\installers\nasm-2.10.01-win32.zip -oc:\ > c:\installers\nasm.install.log
 
@@ -22,6 +22,9 @@ install:
 
       git clone --depth=1 https://github.com/libjpeg-turbo/buildscripts.git -b %APPVEYOR_REPO_BRANCH% c:/buildscripts
 
+cache:
+  - c:\installers\nasm-2.10.01-win32.zip -> appveyor.yml
+
 build_script:
   - cmd: >-
       for /f %%i in ('"cygpath %CD%"') do set MINGWPATH=%%i
diff --git a/simd/arm/jsimd.c b/simd/arm/jsimd.c
index 0fb81976..45f9b047 100644
--- a/simd/arm/jsimd.c
+++ b/simd/arm/jsimd.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2011, Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2009-2011, 2013-2014, 2016, 2018, D. R. Commander.
  * Copyright (C) 2015-2016, 2018, Matthieu Darbois.
+ * Copyright (C) 2019, Google LLC.
  *
  * Based on the x86 SIMD extension for IJG JPEG library,
  * Copyright (C) 1999-2006, MIYASAKA Masaru.
@@ -30,7 +31,7 @@
 static unsigned int simd_support = ~0;
 static unsigned int simd_huffman = 1;
 
-#if defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
+#if !defined(__ARM_NEON__) && (defined(__linux__) || defined(ANDROID) || defined(__ANDROID__))
 
 #define SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT  (1024 * 1024)
 
@@ -105,7 +106,7 @@ init_simd(void)
 #ifndef NO_GETENV
   char *env = NULL;
 #endif
-#if !defined(__ARM_NEON__) && defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
+#if !defined(__ARM_NEON__) && (defined(__linux__) || defined(ANDROID) || defined(__ANDROID__))
   int bufsize = 1024; /* an initial guess for the line buffer size limit */
 #endif
 
diff --git a/turbojpeg.c b/turbojpeg.c
index b3caa0d4..f57f981a 100644
--- a/turbojpeg.c
+++ b/turbojpeg.c
@@ -237,7 +237,9 @@ static int setCompDefaults(struct jpeg_compress_struct *cinfo, int pixelFormat,
                            int subsamp, int jpegQual, int flags)
 {
   int retval = 0;
+#ifndef NO_GETENV
   char *env = NULL;
+#endif
 
   cinfo->in_color_space = pf2cs[pixelFormat];
   cinfo->input_components = tjPixelSize[pixelFormat];