diff --git a/gmic.changes b/gmic.changes
index 57968ea..aa56834 100644
--- a/gmic.changes
+++ b/gmic.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Sep 26 07:35:42 UTC 2022 - Christophe Giboudeaux <christophe@krop.fr>
+
+- Use opencv 4 for building gmic on 15.4 and PowerPC
+
 -------------------------------------------------------------------
 Fri Sep  2 07:08:01 UTC 2022 - Christophe Giboudeaux <christophe@krop.fr>
 
diff --git a/gmic.spec b/gmic.spec
index 7c7c657..c63207d 100644
--- a/gmic.spec
+++ b/gmic.spec
@@ -93,17 +93,12 @@ BuildRequires:  pkgconfig(libtiff-4)
 BuildRequires:  pkgconfig(zlib)
 # gmic first looks for opencv 4 and falls back to opencv 3 if not found.
 # opencv 4 in not available in leap <= 15.3
-%if 0%{?suse_version} <= 1500
-BuildRequires:  pkgconfig(opencv)
-%else
-# ppc64 doesn't have opencv4
-%ifarch ppc64
+%if 0%{suse_version} == 1500 && 0%{?sle_version} < 150400
 BuildRequires:  pkgconfig(opencv)
 %else
 BuildRequires:  pkgconfig(opencv4)
 BuildRequires:  pkgconfig(zlib)
 %endif
-%endif
 Requires:       gmic-data = %{version}
 
 %description