diff --git a/deps/blas.mk b/deps/blas.mk
index 7a73282fd0ee8..68271f32e1cf3 100644
--- a/deps/blas.mk
+++ b/deps/blas.mk
@@ -95,12 +95,17 @@ OPENBLAS_BUILD_OPTS += MAKE_NB_JOBS=0
 ifneq ($(USE_BINARYBUILDER_OPENBLAS), 1)
 
 $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-winexit.patch-applied: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/source-extracted
-       cd $(BUILDDIR)/$(OPENBLAS_SRC_DIR) && \
-               patch -p1 -f < $(SRCDIR)/patches/openblas-winexit.patch
-       echo 1 > $@
+	cd $(BUILDDIR)/$(OPENBLAS_SRC_DIR) && \
+		patch -p1 -f < $(SRCDIR)/patches/openblas-winexit.patch
+	echo 1 > $@
+
+$(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-ofast-power.patch-applied: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-winexit.patch-applied
+	cd $(BUILDDIR)/$(OPENBLAS_SRC_DIR) && \
+		patch -p1 -f < $(SRCDIR)/patches/openblas-ofast-power.patch
+	echo 1 > $@
 
-$(BUILDDIR)/$(OPENBLAS_SRC_DIR)/build-configured: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-winexit.patch-applied
-       echo 1 > $@
+$(BUILDDIR)/$(OPENBLAS_SRC_DIR)/build-configured: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/openblas-ofast-power.patch-applied
+	echo 1 > $@
 
 $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/build-compiled: $(BUILDDIR)/$(OPENBLAS_SRC_DIR)/build-configured
 	echo $(MAKE) -C $(dir $<) $(OPENBLAS_BUILD_OPTS) # echo first, so we only print the error message below in a failure case
diff --git a/deps/patches/openblas-ofast-power.patch b/deps/patches/openblas-ofast-power.patch
new file mode 100644
index 0000000000000..3d777eb2c8f7a
--- /dev/null
+++ b/deps/patches/openblas-ofast-power.patch
@@ -0,0 +1,33 @@
+ Makefile.power | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/Makefile.power b/Makefile.power
+index 24d8aa8a..e53a243a 100644
+--- a/Makefile.power
++++ b/Makefile.power
+@@ -11,20 +11,20 @@ endif
+ 
+ ifeq ($(CORE), POWER9)
+ ifeq ($(USE_OPENMP), 1)
+-COMMON_OPT += -Ofast -mcpu=power9 -mtune=power9 -mvsx -malign-power -DUSE_OPENMP -fno-fast-math -fopenmp
++COMMON_OPT += -mcpu=power9 -mtune=power9 -mvsx -malign-power -DUSE_OPENMP -fno-fast-math -fopenmp
+ FCOMMON_OPT += -O2 -frecursive -mcpu=power9 -mtune=power9 -malign-power -DUSE_OPENMP -fno-fast-math -fopenmp
+ else
+-COMMON_OPT += -Ofast -mcpu=power9 -mtune=power9 -mvsx -malign-power -fno-fast-math
++COMMON_OPT += -mcpu=power9 -mtune=power9 -mvsx -malign-power -fno-fast-math
+ FCOMMON_OPT += -O2 -frecursive -mcpu=power9 -mtune=power9 -malign-power -fno-fast-math
+ endif
+ endif
+ 
+ ifeq ($(CORE), POWER8)
+ ifeq ($(USE_OPENMP), 1)
+-COMMON_OPT += -Ofast -mcpu=power8 -mtune=power8 -mvsx -malign-power -DUSE_OPENMP -fno-fast-math -fopenmp
++COMMON_OPT += -mcpu=power8 -mtune=power8 -mvsx -malign-power -DUSE_OPENMP -fno-fast-math -fopenmp
+ FCOMMON_OPT += -O2 -frecursive -mcpu=power8 -mtune=power8 -malign-power -DUSE_OPENMP -fno-fast-math -fopenmp
+ else
+-COMMON_OPT += -Ofast -mcpu=power8 -mtune=power8 -mvsx -malign-power -fno-fast-math
++COMMON_OPT += -mcpu=power8 -mtune=power8 -mvsx -malign-power -fno-fast-math
+ FCOMMON_OPT += -O2 -frecursive -mcpu=power8 -mtune=power8 -malign-power -fno-fast-math
+ endif
+ endif
+