diff --git a/RecoEgamma/EgammaElectronAlgos/BuildFile.xml b/RecoEgamma/EgammaElectronAlgos/BuildFile.xml
index 8d092d27f688e..e52b328f9c95d 100644
--- a/RecoEgamma/EgammaElectronAlgos/BuildFile.xml
+++ b/RecoEgamma/EgammaElectronAlgos/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="TrackingTools/MaterialEffects"/>
 <use name="FWCore/Framework"/>
 <use name="FWCore/ParameterSet"/>
diff --git a/RecoEgamma/EgammaPhotonAlgos/BuildFile.xml b/RecoEgamma/EgammaPhotonAlgos/BuildFile.xml
index daac60baad259..fbeaa40f3d5c1 100644
--- a/RecoEgamma/EgammaPhotonAlgos/BuildFile.xml
+++ b/RecoEgamma/EgammaPhotonAlgos/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="FWCore/Framework"/>
 <use name="FWCore/ParameterSet"/>
 <use name="Geometry/CaloGeometry"/>
diff --git a/RecoPixelVertexing/PixelTriplets/BuildFile.xml b/RecoPixelVertexing/PixelTriplets/BuildFile.xml
index 0439ea88a8213..abdbd0d329341 100644
--- a/RecoPixelVertexing/PixelTriplets/BuildFile.xml
+++ b/RecoPixelVertexing/PixelTriplets/BuildFile.xml
@@ -27,5 +27,4 @@
 <export>
   <lib name="1"/>
 </export>
-<use name="ofast-flag"/>
 <flags CXXFLAGS="-fno-math-errno"/>
diff --git a/RecoPixelVertexing/PixelTriplets/plugins/BuildFile.xml b/RecoPixelVertexing/PixelTriplets/plugins/BuildFile.xml
index de2a40fc8b0f0..b39238175085a 100644
--- a/RecoPixelVertexing/PixelTriplets/plugins/BuildFile.xml
+++ b/RecoPixelVertexing/PixelTriplets/plugins/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="CUDADataFormats/Track"/>
 <use name="CUDADataFormats/TrackingRecHit"/>
 <use name="CommonTools/RecoAlgos"/>
diff --git a/RecoTracker/FinalTrackSelectors/BuildFile.xml b/RecoTracker/FinalTrackSelectors/BuildFile.xml
index 8c55683a9a67d..d11c47c5a0fcb 100644
--- a/RecoTracker/FinalTrackSelectors/BuildFile.xml
+++ b/RecoTracker/FinalTrackSelectors/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="DataFormats/TrackReco"/>
 <use name="DataFormats/VertexReco"/>
 <use name="FWCore/Framework"/>
diff --git a/RecoTracker/FinalTrackSelectors/plugins/BuildFile.xml b/RecoTracker/FinalTrackSelectors/plugins/BuildFile.xml
index ed0db0add7b33..cb3629d3002f9 100644
--- a/RecoTracker/FinalTrackSelectors/plugins/BuildFile.xml
+++ b/RecoTracker/FinalTrackSelectors/plugins/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="CommonTools/Statistics"/>
 <use name="CommonTools/Utils"/>
 <use name="CondFormats/GBRForest"/>
diff --git a/RecoTracker/TkDetLayers/BuildFile.xml b/RecoTracker/TkDetLayers/BuildFile.xml
index daee53060a497..cdcd0d1c5240f 100644
--- a/RecoTracker/TkDetLayers/BuildFile.xml
+++ b/RecoTracker/TkDetLayers/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <export>
   <lib name="1"/>
 </export>
diff --git a/RecoTracker/TkHitPairs/BuildFile.xml b/RecoTracker/TkHitPairs/BuildFile.xml
index 7135873ce5401..4ffcdc12e5bc2 100644
--- a/RecoTracker/TkHitPairs/BuildFile.xml
+++ b/RecoTracker/TkHitPairs/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="clhep"/>
 <use name="boost"/>
 <use name="root"/>
diff --git a/RecoVertex/PrimaryVertexProducer/BuildFile.xml b/RecoVertex/PrimaryVertexProducer/BuildFile.xml
index 4109da36327ba..2b54c68a4c09b 100644
--- a/RecoVertex/PrimaryVertexProducer/BuildFile.xml
+++ b/RecoVertex/PrimaryVertexProducer/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="DataFormats/BeamSpot"/>
 <use name="DataFormats/VertexReco"/>
 <use name="FWCore/Framework"/>
diff --git a/TrackingTools/GsfTools/BuildFile.xml b/TrackingTools/GsfTools/BuildFile.xml
index 03ff0ce3c650e..7846eff1af130 100644
--- a/TrackingTools/GsfTools/BuildFile.xml
+++ b/TrackingTools/GsfTools/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="CLHEP"/>
 <export>
   <lib name="1"/>
diff --git a/TrackingTools/GsfTools/plugins/BuildFile.xml b/TrackingTools/GsfTools/plugins/BuildFile.xml
index dcde5f9ae2fae..8f004b704c415 100644
--- a/TrackingTools/GsfTools/plugins/BuildFile.xml
+++ b/TrackingTools/GsfTools/plugins/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="TrackingTools/Records"/>
 <use name="TrackingTools/GsfTools"/>
 <use name="FWCore/Framework"/>
diff --git a/TrackingTools/GsfTools/test/BuildFile.xml b/TrackingTools/GsfTools/test/BuildFile.xml
index 07dc61e81a31b..1238d12e1ea46 100644
--- a/TrackingTools/GsfTools/test/BuildFile.xml
+++ b/TrackingTools/GsfTools/test/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="TrackingTools/GsfTools"/>
 <use name="TrackingTools/AnalyticalJacobians"/>
 <use name="rootmath"/>
diff --git a/TrackingTools/GsfTracking/BuildFile.xml b/TrackingTools/GsfTracking/BuildFile.xml
index f38545c852ee3..3e8c5c7c02a5e 100644
--- a/TrackingTools/GsfTracking/BuildFile.xml
+++ b/TrackingTools/GsfTracking/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="boost"/>
 <use name="CLHEP"/>
 <export>
diff --git a/TrackingTools/KalmanUpdators/BuildFile.xml b/TrackingTools/KalmanUpdators/BuildFile.xml
index 4979580f0beb4..01848fccfebea 100644
--- a/TrackingTools/KalmanUpdators/BuildFile.xml
+++ b/TrackingTools/KalmanUpdators/BuildFile.xml
@@ -1,5 +1,4 @@
 <flags CXXFLAGS="-funroll-all-loops"/>
-<use name="ofast-flag"/>
 <use name="clhep"/>
 <use name="RecoTracker/TransientTrackingRecHit"/>
 <use name="TrackingTools/TransientTrackingRecHit"/>
diff --git a/TrackingTools/MaterialEffects/plugins/BuildFile.xml b/TrackingTools/MaterialEffects/plugins/BuildFile.xml
index d574cd826f2ae..f301fb8bf2675 100644
--- a/TrackingTools/MaterialEffects/plugins/BuildFile.xml
+++ b/TrackingTools/MaterialEffects/plugins/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="TrackingTools/Records"/>
 <use name="TrackingTools/MaterialEffects"/>
 <library file="*.cc" name="TrackingToolsMaterialEffectsPlugins">
diff --git a/TrackingTools/TrackFitters/BuildFile.xml b/TrackingTools/TrackFitters/BuildFile.xml
index f2147877988e0..d83bf9475f9c5 100644
--- a/TrackingTools/TrackFitters/BuildFile.xml
+++ b/TrackingTools/TrackFitters/BuildFile.xml
@@ -1,5 +1,4 @@
 <flags CXXFLAGS="-ffp-contract=off"/>
-<use name="ofast-flag"/>
 <use name="boost"/>
 <use name="CLHEP"/>
 <export>
diff --git a/TrackingTools/TrajectoryState/BuildFile.xml b/TrackingTools/TrajectoryState/BuildFile.xml
index a6afb70dd0359..470a8e224a101 100644
--- a/TrackingTools/TrajectoryState/BuildFile.xml
+++ b/TrackingTools/TrajectoryState/BuildFile.xml
@@ -1,4 +1,3 @@
-<use name="ofast-flag"/>
 <use name="DataFormats/Common"/>
 <use name="DataFormats/GeometrySurface"/>
 <use name="DataFormats/GeometryVector"/>