diff --git a/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.6.spec b/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.6.spec
index 77ba4a890..5b8c78cc8 100644
--- a/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.6.spec
+++ b/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.6.spec
@@ -88,8 +88,8 @@ Group: 			Development/Tools
 %setup -q
 
 %build
-    # Nothing to do
-    # true
+    # Make the shebang line portable
+    python setup.py build --executable "/usr/bin/env python"
 
 %install
     python setup.py install --prefix=$RPM_BUILD_ROOT/%{_installPrefix}
diff --git a/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.7.spec b/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.7.spec
index 50ff096e4..b0592469c 100644
--- a/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.7.spec
+++ b/ThirdParty/rpmBuild/SPECS/PyFoam-0.5.7.spec
@@ -88,8 +88,8 @@ Group: 			Development/Tools
 %setup -q
 
 %build
-    # Nothing to do
-    # true
+    # Make the shebang line portable
+    python setup.py build --executable "/usr/bin/env python"
 
 %install
     python setup.py install --prefix=$RPM_BUILD_ROOT/%{_installPrefix}