diff --git a/src/backend/utils/adt/formatting.c b/src/backend/utils/adt/formatting.c
index a345c656050..c8a9f939d6b 100644
--- a/src/backend/utils/adt/formatting.c
+++ b/src/backend/utils/adt/formatting.c
@@ -1551,6 +1551,7 @@ str_tolower(const char *buff, size_t nbytes, Oid collid)
 										&buff_conv, buff_uchar, len_uchar);
 			icu_from_uchar(&result, buff_conv, len_conv);
 			pfree(buff_uchar);
+			pfree(buff_conv);
 		}
 		else
 #endif
@@ -1673,6 +1674,7 @@ str_toupper(const char *buff, size_t nbytes, Oid collid)
 										&buff_conv, buff_uchar, len_uchar);
 			icu_from_uchar(&result, buff_conv, len_conv);
 			pfree(buff_uchar);
+			pfree(buff_conv);
 		}
 		else
 #endif
@@ -1796,6 +1798,7 @@ str_initcap(const char *buff, size_t nbytes, Oid collid)
 										&buff_conv, buff_uchar, len_uchar);
 			icu_from_uchar(&result, buff_conv, len_conv);
 			pfree(buff_uchar);
+			pfree(buff_conv);
 		}
 		else
 #endif