diff --git a/include/abg-tools-utils.h b/include/abg-tools-utils.h
index 94eb3bba..f9745e59 100644
--- a/include/abg-tools-utils.h
+++ b/include/abg-tools-utils.h
@@ -115,7 +115,7 @@ enum file_type
   FILE_TYPE_RPM,
   /// An SRPM (.src.rpm) file
   FILE_TYPE_SRPM,
-  /// An DEB (.deb) binary file
+  /// A DEB (.deb) binary file
   FILE_TYPE_DEB,
   /// A plain directory
   FILE_TYPE_DIR
diff --git a/tools/abipkgdiff.cc b/tools/abipkgdiff.cc
index ed50eb50..f7e656a5 100644
--- a/tools/abipkgdiff.cc
+++ b/tools/abipkgdiff.cc
@@ -1128,7 +1128,7 @@ main(int argc, char* argv[])
   switch (first_package->type())
     {
     case abigail::tools_utils::FILE_TYPE_RPM:
-      if (!(second_package->type() == abigail::tools_utils::FILE_TYPE_RPM))
+      if (second_package->type() != abigail::tools_utils::FILE_TYPE_RPM)
 	{
 	  cerr << opts.package2 << " should be an RPM file\n";
 	  return 1;
@@ -1136,9 +1136,9 @@ main(int argc, char* argv[])
       break;
 
     case abigail::tools_utils::FILE_TYPE_DEB:
-      if (!(second_package->type() == abigail::tools_utils::FILE_TYPE_DEB))
+      if (second_package->type() != abigail::tools_utils::FILE_TYPE_DEB)
 	{
-	  cerr << opts.package2 << " should be an DEB file\n";
+	  cerr << opts.package2 << " should be a DEB file\n";
 	  return 1;
 	}
       break;