diff --git a/openexr.spec b/openexr.spec
index 4443ead..4e8994c 100644
--- a/openexr.spec
+++ b/openexr.spec
@@ -36,7 +36,7 @@ BuildRequires:  fltk-devel
 BuildRequires:  freeglut-devel
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig
-BuildRequires:  pkgconfig(IlmBase) >= %{version}
+BuildRequires:  pkgconfig(IlmBase) == %{version}
 BuildRequires:  pkgconfig(zlib)
 Obsoletes:      OpenEXR <= 1.6.1
 Provides:       OpenEXR = %{version}