diff --git a/configure b/configure
index b2b6f36c..e45f14ce 100755
--- a/configure
+++ b/configure
@@ -3018,7 +3018,7 @@ fi;
 if test "$debugging" = "yes"; then
     CFLAGS="-O -g -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -D_REENTRANT"
 else
-    CFLAGS="-O3 -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -D_REENTRANT"
+    CFLAGS="-O3 -fno-strict-aliasing -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -D_REENTRANT"
 fi
 
 # Check whether --enable-optimize or --disable-optimize was given.
diff --git a/configure.in b/configure.in
index def8ffe4..f58cc9db 100644
--- a/configure.in
+++ b/configure.in
@@ -75,7 +75,7 @@ AC_ARG_ENABLE(debugging,   [  --enable-debugging      Compile for debugging], [
 if test "$debugging" = "yes"; then
     CFLAGS="-O -g -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -D_REENTRANT"
 else
-    CFLAGS="-O3 -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -D_REENTRANT"
+    CFLAGS="-O3 -fno-strict-aliasing -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -D_REENTRANT"
 fi 
 
 AC_ARG_ENABLE(optimize,   [  --enable-optimize       Enable CPU optimize], [ optimize=$enableval ], [ optimize=no ])