diff --git a/src/sparsevec.c b/src/sparsevec.c
index 335ebe0..7c1bd6d 100644
--- a/src/sparsevec.c
+++ b/src/sparsevec.c
@@ -310,6 +310,9 @@ sparsevec_in(PG_FUNCTION_ARGS)
 
 	stringEnd++;
 
+	while (sparsevec_isspace(*stringEnd))
+		stringEnd++;
+
 	if (*stringEnd != '/')
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
@@ -318,6 +321,9 @@ sparsevec_in(PG_FUNCTION_ARGS)
 
 	stringEnd++;
 
+	while (sparsevec_isspace(*stringEnd))
+		stringEnd++;
+
 	/* Use similar logic as int2vectorin */
 	errno = 0;
 	pt = stringEnd;
diff --git a/test/expected/sparsevec_input.out b/test/expected/sparsevec_input.out
index b27d205..79ee1fc 100644
--- a/test/expected/sparsevec_input.out
+++ b/test/expected/sparsevec_input.out
@@ -4,7 +4,7 @@ SELECT '{1:1.5,3:3.5}/5'::sparsevec;
  {1:1.5,3:3.5}/5
 (1 row)
 
-SELECT ' { 1 : 1.5 ,  3  :  3.5  }/5 '::sparsevec;
+SELECT ' { 1 : 1.5 ,  3  :  3.5  } / 5 '::sparsevec;
     sparsevec    
 -----------------
  {1:1.5,3:3.5}/5
diff --git a/test/sql/sparsevec_input.sql b/test/sql/sparsevec_input.sql
index c85545d..802348f 100644
--- a/test/sql/sparsevec_input.sql
+++ b/test/sql/sparsevec_input.sql
@@ -1,5 +1,5 @@
 SELECT '{1:1.5,3:3.5}/5'::sparsevec;
-SELECT ' { 1 : 1.5 ,  3  :  3.5  }/5 '::sparsevec;
+SELECT ' { 1 : 1.5 ,  3  :  3.5  } / 5 '::sparsevec;
 
 SELECT ''::sparsevec;
 SELECT '{'::sparsevec;