diff --git a/src/potential/grdseamount.c b/src/potential/grdseamount.c
index 374604fb13e..08547d3dfb8 100644
--- a/src/potential/grdseamount.c
+++ b/src/potential/grdseamount.c
@@ -44,7 +44,7 @@
 #define THIS_MODULE_MODERN_NAME	"grdseamount"
 #define THIS_MODULE_LIB		"potential"
 #define THIS_MODULE_PURPOSE	"Create synthetic seamounts (Gaussian, parabolic, polynomial, cone or disc; circular or elliptical)"
-#define THIS_MODULE_KEYS	"<T{,GG},LD),MD),TD("
+#define THIS_MODULE_KEYS	"<D{,GG},KG(,WG(,LD),MD),TD("
 #define THIS_MODULE_NEEDS	"R"
 #define THIS_MODULE_OPTIONS "-:RVbdefhir"
 
@@ -1219,7 +1219,7 @@ struct SEAMOUNT *grdseamount_read_input (struct GMTAPI_CTRL *API, struct GRDSEAM
 		}
 		n_time = 0;	/* Number of numerical columns used for time for current record */
 		S[n].code = Ctrl->C.code;	/* Set default code if given */
-		if (In->text[0]) {	/* May have passed time information and/or code via trailing text */
+		if (In->text && In->text[0]) {	/* May have passed time information and/or code via trailing text */
 			int ns = sscanf (In->text, "%s %s %s", txt_x, txt_y, m);	/* Only consider first three words */
 			if (Ctrl->T.active) {	/* -T requires times t0, t1 */
 				if (ns == 1)	{	/* Possibly only shape code was given as trailing text */
@@ -1981,6 +1981,7 @@ EXTERN_MSC int GMT_grdseamount (void *V_API, int mode, void *args) {
 		if (GMT_Set_Comment (API, GMT_IS_GRID, GMT_COMMENT_IS_OPTION | GMT_COMMENT_IS_COMMAND, options, Grid))
 			goto wrap_up;
 		gmt_M_memcpy (data, Grid->data, Grid->header->size, gmt_grdfloat);	/* This will go away once gmt_nc.c is fixed to leave array alone */
+		if (API->GMT->current.io.col_type[GMT_X][0] == GMT_IS_LON) Grid->header->ProjRefPROJ4 = strdup("+proj=longlat");
 		if (GMT_Write_Data (API, GMT_IS_GRID, GMT_IS_FILE, GMT_IS_SURFACE, GMT_CONTAINER_AND_DATA, NULL, gfile, Grid) != GMT_NOERROR)
 			goto wrap_up;
 		gmt_M_memcpy (Grid->data, data, Grid->header->size, gmt_grdfloat);