diff --git a/src/halfvec.c b/src/halfvec.c
index ee12cc4..010c03f 100644
--- a/src/halfvec.c
+++ b/src/halfvec.c
@@ -295,7 +295,15 @@ Float4ToHalf(float num)
 	half		result = Float4ToHalfUnchecked(num);
 
 	if (unlikely(HalfIsInf(result)) && !isinf(num))
-		float_overflow_error();
+	{
+		char	   *buf = palloc(FLOAT_SHORTEST_DECIMAL_LEN);
+
+		float_to_shortest_decimal_buf(num, buf);
+
+		ereport(ERROR,
+				(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+				 errmsg("\"%s\" is out of range for type halfvec", buf)));
+	}
 	if (unlikely(HalfIsZero(result)) && num != 0.0)
 		float_underflow_error();
 
@@ -394,14 +402,6 @@ halfvec_isspace(char ch)
 }
 
 #if PG_VERSION_NUM < 120003
-static pg_noinline void
-float_overflow_error(void)
-{
-	ereport(ERROR,
-			(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
-			 errmsg("value out of range: overflow")));
-}
-
 static pg_noinline void
 float_underflow_error(void)
 {
diff --git a/test/expected/cast.out b/test/expected/cast.out
index 6432af4..2286c58 100644
--- a/test/expected/cast.out
+++ b/test/expected/cast.out
@@ -111,7 +111,7 @@ SELECT '{1,2,3}'::real[]::halfvec(3);
 SELECT '{1,2,3}'::real[]::halfvec(2);
 ERROR:  expected 2 dimensions, not 3
 SELECT '{65520,-65520}'::real[]::halfvec;
-ERROR:  value out of range: overflow
+ERROR:  "65520" is out of range for type halfvec
 SELECT '{1e-8,-1e-8}'::real[]::halfvec;
 ERROR:  value out of range: underflow
 SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec;