diff --git a/configure b/configure
index aeb7c22f7b..ea38883196 100755
--- a/configure
+++ b/configure
@@ -2061,6 +2061,7 @@ EOF
   avr32)
     _arch='AVR32'
     _target_arch='ARCH_AVR32 = yes'
+    def_fast_unaligned='#define HAVE_FAST_UNALIGNED 1'
     iproc='avr32'
     ;;