diff --git a/spirv-tools.spec b/spirv-tools.spec
index ae7d50c..eb19031 100644
--- a/spirv-tools.spec
+++ b/spirv-tools.spec
@@ -33,6 +33,7 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  bison
 BuildRequires:  cmake >= 2.8
 BuildRequires:  gcc-c++
+BuildRequires:  python3
 BuildRequires:  spirv-headers
 
 %description