diff --git a/cmds/lshal/TextTable.h b/cmds/lshal/TextTable.h
index 91d522a..301b4bd 100644
--- a/cmds/lshal/TextTable.h
+++ b/cmds/lshal/TextTable.h
@@ -33,11 +33,11 @@
     TextTableRow() {}
 
     // A row of cells.
-    TextTableRow(std::vector<std::string>&& v) : mFields(std::move(v)) {}
+    explicit TextTableRow(std::vector<std::string>&& v) : mFields(std::move(v)) {}
 
     // A single comment string.
-    TextTableRow(std::string&& s) : mLine(std::move(s)) {}
-    TextTableRow(const std::string& s) : mLine(s) {}
+    explicit TextTableRow(std::string&& s) : mLine(std::move(s)) {}
+    explicit TextTableRow(const std::string& s) : mLine(s) {}
 
     // Whether this row is an actual row of cells.
     bool isRow() const { return !fields().empty(); }