diff --git a/openblas-0.3.10-zdot-ppc64le.patch b/openblas-0.3.10-zdot-ppc64le.patch
new file mode 100644
index 0000000..28c027e
--- /dev/null
+++ b/openblas-0.3.10-zdot-ppc64le.patch
@@ -0,0 +1,34 @@
+diff -up OpenBLAS-0.3.10/kernel/power/zdot.c.ppc64le OpenBLAS-0.3.10/kernel/power/zdot.c
+--- OpenBLAS-0.3.10/kernel/power/zdot.c.ppc64le	2020-06-14 22:03:04.000000000 +0200
++++ OpenBLAS-0.3.10/kernel/power/zdot.c	2020-09-18 11:18:16.102180677 +0200
+@@ -94,8 +94,11 @@ FLOAT _Complex CNAME(BLASLONG n, FLOAT *
+ 
+ 	if ( n <= 0 ) 
+ 	{
++	  /*
+ 	        __real__ result = 0.0 ;
+         	__imag__ result = 0.0 ;
++	  */
++	        result = OPENBLAS_MAKE_COMPLEX_FLOAT(0.0,0.0);
+ 		return(result);
+ 
+ 	}
+@@ -149,12 +152,17 @@ FLOAT _Complex CNAME(BLASLONG n, FLOAT *
+ 	}
+ 
+ #if !defined(CONJ)
++	/*
+ 	__real__ result = dot[0] - dot[1];
+ 	__imag__ result = dot[2] + dot[3];
++	*/
++	result = OPENBLAS_MAKE_COMPLEX_FLOAT(dot[0]-dot[1],dot[2]+dot[3]);
+ #else
++	/*
+ 	__real__ result = dot[0] + dot[1];
+ 	__imag__ result = dot[2] - dot[3];
+-
++	*/
++	result = OPENBLAS_MAKE_COMPLEX_FLOAT(dot[0]+dot[1],dot[2]-dot[3]);
+ #endif
+ 
+ 	return(result);
diff --git a/openblas.spec b/openblas.spec
index 7c00d66..42e0e04 100644
--- a/openblas.spec
+++ b/openblas.spec
@@ -15,7 +15,7 @@
 
 Name:           openblas
 Version:        0.3.10
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        An optimized BLAS library based on GotoBLAS2
 License:        BSD
 URL:            https://github.com/xianyi/OpenBLAS/
@@ -34,7 +34,8 @@ Patch5:         https://github.com/xianyi/OpenBLAS/pull/2672.patch
 Patch6:         https://github.com/xianyi/OpenBLAS/pull/2784.patch 
 # Supply the proper flags to the test makefile
 Patch3:         openblas-0.3.7-tests.patch
-
+# Fix zdotc on ppc64le (BZ #1878449)
+Patch7:         openblas-0.3.10-zdot-ppc64le.patch
 
 BuildRequires:  gcc
 BuildRequires:  gcc-c++
@@ -250,6 +251,7 @@ cd OpenBLAS-%{version}
 %patch5 -p1 -b .fewcpus
 %patch6 -p1 -b .bfloat16
 %patch3 -p1 -b .tests
+%patch7 -p1 -b .ppc64le
 
 # Fix source permissions
 find -name \*.f -exec chmod 644 {} \;
@@ -655,6 +657,9 @@ rm -rf %{buildroot}%{_libdir}/pkgconfig
 %endif
 
 %changelog
+* Fri Sep 18 2020 Susi Lehtola <jussilehtola@fedoraproject.org> - 0.3.10-6
+- Fix incorrect result of cblas_zdotc_sub on ppc64le (BZ #1878449).
+
 * Sat Aug 29 2020 Susi Lehtola <jussilehtola@fedoraproject.org> - 0.3.10-5
 - Fix unresolved bfloat16 datatype (BZ #1873667).