diff --git a/repos/base/include/util/string.h b/repos/base/include/util/string.h
index 32ed190d5..aa4197697 100644
--- a/repos/base/include/util/string.h
+++ b/repos/base/include/util/string.h
@@ -443,8 +443,11 @@ namespace Genode {
 		if (i > 0)
 			switch (s[i]) {
 			case 'G': res *= 1024;
+				[[fallthrough]];
 			case 'M': res *= 1024;
+				[[fallthrough]];
 			case 'K': res *= 1024; i++;
+				[[fallthrough]];
 			default: break;
 			}