diff --git a/c++utilities/mingw-w64/PKGBUILD b/c++utilities/mingw-w64/PKGBUILD
index 84e5766a..4b965d8d 100644
--- a/c++utilities/mingw-w64/PKGBUILD
+++ b/c++utilities/mingw-w64/PKGBUILD
@@ -24,7 +24,6 @@ _architectures='i686-w64-mingw32 x86_64-w64-mingw32'
 
 build() {
   cd "$srcdir/${PROJECT_DIR_NAME:-$_reponame-$pkgver}"
-  export CXXFLAGS='-O0'
   for _arch in ${_architectures}; do
     for _config in "${_configurations[@]}"; do
       msg2 "Building ${_config%%: *} version for ${_arch}"
diff --git a/passwordfile/mingw-w64/PKGBUILD b/passwordfile/mingw-w64/PKGBUILD
index fedcd5ff..0752f092 100644
--- a/passwordfile/mingw-w64/PKGBUILD
+++ b/passwordfile/mingw-w64/PKGBUILD
@@ -24,7 +24,6 @@ _architectures='i686-w64-mingw32 x86_64-w64-mingw32'
 
 build() {
   cd "$srcdir/${PROJECT_DIR_NAME:-$_reponame-$pkgver}"
-  export CXXFLAGS='-O0'
   for _arch in ${_architectures}; do
     for _config in "${_configurations[@]}"; do
       msg2 "Building ${_config%%: *} version for ${_arch}"
diff --git a/qtutilities/mingw-w64/PKGBUILD b/qtutilities/mingw-w64/PKGBUILD
index 7058da86..4af18a64 100644
--- a/qtutilities/mingw-w64/PKGBUILD
+++ b/qtutilities/mingw-w64/PKGBUILD
@@ -28,7 +28,6 @@ _architectures='i686-w64-mingw32 x86_64-w64-mingw32'
 
 build() {
   cd "$srcdir/${PROJECT_DIR_NAME:-$_reponame-$pkgver}"
-  export CXXFLAGS='-O0'
   export PREVENT_FORCING_SHARED_LIBS=ON
   for _arch in ${_architectures}; do
     for _config in "${_configurations[@]}"; do
diff --git a/tagparser/mingw-w64/PKGBUILD b/tagparser/mingw-w64/PKGBUILD
index c6449891..4ef9857f 100644
--- a/tagparser/mingw-w64/PKGBUILD
+++ b/tagparser/mingw-w64/PKGBUILD
@@ -24,7 +24,6 @@ _architectures='i686-w64-mingw32 x86_64-w64-mingw32'
 
 build() {
   cd "$srcdir/${PROJECT_DIR_NAME:-$_reponame-$pkgver}"
-  export CXXFLAGS='-O0'
   for _arch in ${_architectures}; do
     for _config in "${_configurations[@]}"; do
       msg2 "Building ${_config%%: *} version for ${_arch}"