diff --git a/configure.ac b/configure.ac
index 54d8acf27..d1fc84848 100644
--- a/configure.ac
+++ b/configure.ac
@@ -119,6 +119,7 @@ AS_IF([test "$host_os" = "Darwin"], [
   SLIBEXTRAFLAGS="-Wl,--no-whole-archive"
   COMP_VERSIONS=
   STATIC_FLAGS=-static
+  CXXFLAGS+=" -fno-strict-aliasing"
 ], [test "${host_os:0:6}" = "CYGWIN"], [
    PLATFORM=win
    SO_EXT=.dll
diff --git a/scripts/config-release.mk.in b/scripts/config-release.mk.in
index 53a50b9db..74d388fec 100644
--- a/scripts/config-release.mk.in
+++ b/scripts/config-release.mk.in
@@ -1,7 +1,7 @@
 
 
 CXX=@CXX@
-CXXFLAGS=@CPPFLAGS@ @CXXFLAGS@ -c -O3 -fomit-frame-pointer -Wall -fopenmp -msse -msse2 -mfpmath=sse
+CXXFLAGS=@CPPFLAGS@ @CXXFLAGS@ -c -O3 -fomit-frame-pointer -fopenmp -msse -msse2 -mfpmath=sse
 CXX_OUT_FLAG=-o
 OBJ_EXT=.o
 LIB_EXT=.a