diff --git a/src/sparsevec.c b/src/sparsevec.c
index 3dd1380..70d9ac9 100644
--- a/src/sparsevec.c
+++ b/src/sparsevec.c
@@ -197,7 +197,7 @@ sparsevec_in(PG_FUNCTION_ARGS)
 {
 	char	   *lit = PG_GETARG_CSTRING(0);
 	int32		typmod = PG_GETARG_INT32(2);
-	int			dim;
+	long		dim;
 	char	   *pt = lit;
 	char	   *stringEnd;
 	SparseVector *result;
@@ -244,7 +244,7 @@ sparsevec_in(PG_FUNCTION_ARGS)
 	{
 		for (;;)
 		{
-			int			index;
+			long		index;
 			float		value;
 
 			/* TODO Better error */
@@ -263,18 +263,17 @@ sparsevec_in(PG_FUNCTION_ARGS)
 						 errmsg("invalid input syntax for type sparsevec: \"%s\"", lit)));
 
 			/* Use similar logic as int2vectorin */
-			errno = 0;
-			index = strtoint(pt, &stringEnd, 10);
+			index = strtol(pt, &stringEnd, 10);
 
 			if (stringEnd == pt)
 				ereport(ERROR,
 						(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
 						 errmsg("invalid input syntax for type sparsevec: \"%s\"", lit)));
 
-			if (errno == ERANGE)
-				ereport(ERROR,
-						(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
-						 errmsg("index \"%s\" is out of range for type sparsevec", pnstrdup(pt, stringEnd - pt))));
+			if (index > INT_MAX)
+				index = INT_MAX;
+			else if (index < INT_MIN)
+				index = INT_MIN;
 
 			pt = stringEnd;
 
@@ -352,18 +351,17 @@ sparsevec_in(PG_FUNCTION_ARGS)
 		pt++;
 
 	/* Use similar logic as int2vectorin */
-	errno = 0;
-	dim = strtoint(pt, &stringEnd, 10);
+	dim = strtol(pt, &stringEnd, 10);
 
 	if (stringEnd == pt)
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
 				 errmsg("invalid input syntax for type sparsevec: \"%s\"", lit)));
 
-	if (errno == ERANGE)
-		ereport(ERROR,
-				(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
-				 errmsg("dimensions \"%s\" is out of range for type sparsevec", pnstrdup(pt, stringEnd - pt))));
+	if (dim > INT_MAX)
+		dim = INT_MAX;
+	else if (dim < INT_MIN)
+		dim = INT_MIN;
 
 	pt = stringEnd;
 
diff --git a/test/expected/sparsevec_input.out b/test/expected/sparsevec_input.out
index 88552ca..dd1bc70 100644
--- a/test/expected/sparsevec_input.out
+++ b/test/expected/sparsevec_input.out
@@ -192,19 +192,19 @@ ERROR:  sparsevec cannot have more than 1000000 dimensions
 LINE 1: SELECT '{}/1000001'::sparsevec;
                ^
 SELECT '{}/2147483648'::sparsevec;
-ERROR:  dimensions "2147483648" is out of range for type sparsevec
+ERROR:  sparsevec cannot have more than 1000000 dimensions
 LINE 1: SELECT '{}/2147483648'::sparsevec;
                ^
 SELECT '{}/-2147483649'::sparsevec;
-ERROR:  dimensions "-2147483649" is out of range for type sparsevec
+ERROR:  sparsevec must have at least 1 dimension
 LINE 1: SELECT '{}/-2147483649'::sparsevec;
                ^
 SELECT '{}/9223372036854775808'::sparsevec;
-ERROR:  dimensions "9223372036854775808" is out of range for type sparsevec
+ERROR:  sparsevec cannot have more than 1000000 dimensions
 LINE 1: SELECT '{}/9223372036854775808'::sparsevec;
                ^
 SELECT '{}/-9223372036854775809'::sparsevec;
-ERROR:  dimensions "-9223372036854775809" is out of range for type sparsevec
+ERROR:  sparsevec must have at least 1 dimension
 LINE 1: SELECT '{}/-9223372036854775809'::sparsevec;
                ^
 SELECT '{2147483647:1}/1'::sparsevec;
@@ -212,7 +212,7 @@ ERROR:  index must be less than or equal to dimensions
 LINE 1: SELECT '{2147483647:1}/1'::sparsevec;
                ^
 SELECT '{2147483648:1}/1'::sparsevec;
-ERROR:  index "2147483648" is out of range for type sparsevec
+ERROR:  index must be less than or equal to dimensions
 LINE 1: SELECT '{2147483648:1}/1'::sparsevec;
                ^
 SELECT '{-2147483648:1}/1'::sparsevec;
@@ -220,7 +220,7 @@ ERROR:  index must be greater than zero
 LINE 1: SELECT '{-2147483648:1}/1'::sparsevec;
                ^
 SELECT '{-2147483649:1}/1'::sparsevec;
-ERROR:  index "-2147483649" is out of range for type sparsevec
+ERROR:  index must be greater than zero
 LINE 1: SELECT '{-2147483649:1}/1'::sparsevec;
                ^
 SELECT '{0:1}/1'::sparsevec;