diff -r 1acae5590352 src/cpuinfo/SDL_cpuinfo.c
--- a/src/cpuinfo/SDL_cpuinfo.c	Wed Dec 19 18:10:02 2018 -0500
+++ b/src/cpuinfo/SDL_cpuinfo.c	Sun Oct 20 21:51:47 2019 -0400
@@ -621,7 +621,7 @@
     if (SDL_CPUFeatures == 0xFFFFFFFF) {
         CPU_calcCPUIDFeatures();
         SDL_CPUFeatures = 0;
-        SDL_SIMDAlignment = 4;  /* a good safe base value */
+        SDL_SIMDAlignment = sizeof(void *);  /* a good safe base value */
         if (CPU_haveRDTSC()) {
             SDL_CPUFeatures |= CPU_HAS_RDTSC;
         }