diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk
index 4e58bec74..939988197 100644
--- a/depends/hosts/darwin.mk
+++ b/depends/hosts/darwin.mk
@@ -8,7 +8,7 @@ darwin_CXX=clang++ -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sys
 darwin_CFLAGS=-pipe
 darwin_CXXFLAGS=$(darwin_CFLAGS)
 
-darwin_release_CFLAGS=-O2
+darwin_release_CFLAGS=-O1
 darwin_release_CXXFLAGS=$(darwin_release_CFLAGS)
 
 darwin_debug_CFLAGS=-O1
diff --git a/depends/hosts/mingw32.mk b/depends/hosts/mingw32.mk
index dbfb62fdc..2248973a1 100644
--- a/depends/hosts/mingw32.mk
+++ b/depends/hosts/mingw32.mk
@@ -1,7 +1,7 @@
 mingw32_CFLAGS=-pipe
 mingw32_CXXFLAGS=$(mingw32_CFLAGS)
 
-mingw32_release_CFLAGS=-O2
+mingw32_release_CFLAGS=-O1
 mingw32_release_CXXFLAGS=$(mingw32_release_CFLAGS)
 
 mingw32_debug_CFLAGS=-O1