diff --git a/notes_unix.go b/notes_unix.go
index 9a0e5c50..97345575 100644
--- a/notes_unix.go
+++ b/notes_unix.go
@@ -53,10 +53,13 @@ func additionalNotesAboutCommand(path string) string {
 	}
 
 	if elfFile, err := elf.Open(path); err == nil {
+		defer elfFile.Close()
 		notes += fmt.Sprintf("  ELF architecture: %s (current architecture: %s)\n", elfFile.Machine, runtime.GOARCH)
 	} else if machoFile, err := macho.Open(path); err == nil {
+		defer machoFile.Close()
 		notes += fmt.Sprintf("  MachO architecture: %s (current architecture: %s)\n", machoFile.Cpu, runtime.GOARCH)
 	} else if peFile, err := pe.Open(path); err == nil {
+		defer peFile.Close()
 		machine, ok := peTypes[peFile.Machine]
 		if !ok {
 			machine = "unknown"
diff --git a/notes_windows.go b/notes_windows.go
index 15680850..7afcaf3f 100644
--- a/notes_windows.go
+++ b/notes_windows.go
@@ -29,10 +29,13 @@ func additionalNotesAboutCommand(path string) string {
 	notes += fmt.Sprintf("  Mode: %s\n", stat.Mode())
 
 	if elfFile, err := elf.Open(path); err == nil {
+		defer elfFile.Close()
 		notes += fmt.Sprintf("  ELF architecture: %s (current architecture: %s)\n", elfFile.Machine, runtime.GOARCH)
 	} else if machoFile, err := macho.Open(path); err == nil {
+		defer machoFile.Close()
 		notes += fmt.Sprintf("  MachO architecture: %s (current architecture: %s)\n", machoFile.Cpu, runtime.GOARCH)
 	} else if peFile, err := pe.Open(path); err == nil {
+		defer peFile.Close()
 		machine, ok := peTypes[peFile.Machine]
 		if !ok {
 			machine = "unknown"