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-rw-r--r--src/utils/stringutils.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/utils/stringutils.h b/src/utils/stringutils.h
index 3307d6e73..67144ea65 100644
--- a/src/utils/stringutils.h
+++ b/src/utils/stringutils.h
@@ -99,7 +99,7 @@ const char *ipToString(const uint32_t address) A_WARN_UNUSED;
/**
* A safe version of sprintf that returns a std::string of the result.
*/
-std::string strprintf(const char *const format, ...) A_WARN_UNUSED
+std::string strprintf(const char *const format, ...) A_NONNULL(1) A_WARN_UNUSED
#ifdef __GNUC__
/* This attribute is nice: it even works through gettext invokation. For
example, gcc will complain that strprintf(_("%s"), 42) is ill-formed. */