diff --git a/hwloc.spec b/hwloc.spec
index d8130c6..925a03d 100644
--- a/hwloc.spec
+++ b/hwloc.spec
@@ -9,6 +9,9 @@ Source0:   http://www.open-mpi.org/software/hwloc/v1.11/downloads/%{name}-%{vers
 Patch0:    0001-Avoid-letting-snprintf-interpret-process-name-as-for.patch
 Requires:  %{name}-libs%{?_isa} = %{version}-%{release}
 
+BuildRequires: gcc
+# C++ only for hwloc-hello-cpp test:
+BuildRequires: gcc-c++
 BuildRequires: cairo-devel
 BuildRequires: libpciaccess-devel
 BuildRequires: libtool-ltdl-devel