diff --git a/include/common/h2.h b/include/common/h2.h
index 65c5ab1c8..fdeafe67d 100644
--- a/include/common/h2.h
+++ b/include/common/h2.h
@@ -190,6 +190,20 @@ static inline int h2_str_to_phdr(const struct ist str)
 	return 0;
 }
 
+/* returns the pseudo-header name <num> as a string, or ":UNKNOWN" if unknown */
+static inline const char *h2_phdr_to_str(int phdr)
+{
+	switch (phdr) {
+	case H2_PHDR_IDX_NONE: return ":NONE";
+	case H2_PHDR_IDX_AUTH: return ":authority";
+	case H2_PHDR_IDX_METH: return ":method";
+	case H2_PHDR_IDX_PATH: return ":path";
+	case H2_PHDR_IDX_SCHM: return ":scheme";
+	case H2_PHDR_IDX_STAT: return ":status";
+	case H2_PHDR_IDX_HOST: return "Host";
+	default:               return ":UNKNOWN";
+	}
+}
 
 #endif /* _COMMON_H2_H */