diff --git a/configure.ac b/configure.ac
index ea30dccae..49dbade0e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5026,12 +5026,12 @@ if test "$ENABLED_SP_ASM" = "yes"; then
     ;;
   *arm*)
     if test $host_alias = "thumb"; then
-      AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_SP_ARM_THUMB_ASM -mthumb -march=armv6"
+      AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_SP_ARM_THUMB_ASM"
       AM_CCASFLAGS="$AM_CCASFLAGS -DWOLFSSL_SP_ARM_THUMB_ASM"
       ENABLED_SP_ARM_THUMB_ASM=yes
     else
       if test $host_alias = "cortex"; then
-        AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_SP_ARM_CORTEX_M_ASM -mcpu=cortex-r5"
+        AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_SP_ARM_CORTEX_M_ASM"
         AM_CCASFLAGS="$AM_CCASFLAGS -DWOLFSSL_SP_ARM_CORTEX_M_ASM"
         ENABLED_SP_ARM_CORTEX_ASM=yes
       else