diff --git a/builtin/providers/postgresql/helpers.go b/builtin/providers/postgresql/helpers.go
index db61713dce..2be57bf396 100644
--- a/builtin/providers/postgresql/helpers.go
+++ b/builtin/providers/postgresql/helpers.go
@@ -18,7 +18,7 @@ func pqQuoteLiteral(in string) string {
 func validateConnLimit(v interface{}, key string) (warnings []string, errors []error) {
 	value := v.(int)
 	if value < -1 {
-		errors = append(errors, fmt.Errorf("%d can not be less than -1", key))
+		errors = append(errors, fmt.Errorf("%s can not be less than -1", key))
 	}
 	return
 }
diff --git a/builtin/providers/postgresql/provider.go b/builtin/providers/postgresql/provider.go
index 0c6aec01f9..d692ba2fb5 100644
--- a/builtin/providers/postgresql/provider.go
+++ b/builtin/providers/postgresql/provider.go
@@ -80,7 +80,7 @@ func Provider() terraform.ResourceProvider {
 func validateConnTimeout(v interface{}, key string) (warnings []string, errors []error) {
 	value := v.(int)
 	if value < 0 {
-		errors = append(errors, fmt.Errorf("%d can not be less than 0", key))
+		errors = append(errors, fmt.Errorf("%s can not be less than 0", key))
 	}
 	return
 }