diff --git a/src/longopt/sphdistance_inc.h b/src/longopt/sphdistance_inc.h
index 34422463aa5..1237a664cd6 100644
--- a/src/longopt/sphdistance_inc.h
+++ b/src/longopt/sphdistance_inc.h
@@ -25,42 +25,17 @@ static struct GMT_KEYWORD_DICTIONARY module_kw[] = {
 		  short_directives,    long_directives,
 		  short_modifiers,     long_modifiers,
 		  transproc_mask */
-	{ 0, 'A', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'C', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'D', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'E', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'G', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'I', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'L', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'N', "",
-	          "",                  "",
-	          "",                  "",
-		  GMT_TP_STANDARD },
-	{ 0, 'Q', "",
-	          "",                  "",
+	{ 0, 'C', "save_mem|single_form", "", "", "", "", GMT_TP_STANDARD },
+	{ 0, 'D', "duplicates|skipdup",   "", "", "", "", GMT_TP_STANDARD },
+	{ 0, 'E', "quantity",
+	          "d,n,z",             "distance,polygon,zvalue",
 	          "",                  "",
 		  GMT_TP_STANDARD },
+	GMT_G_OUTGRID_KW,
+	GMT_I_INCREMENT_KW,
+	{ 0, 'L', "unit|dist_unit",    "", "", "", "", GMT_TP_STANDARD },
+	{ 0, 'N', "nodes|node_table",  "", "", "", "", GMT_TP_STANDARD },
+	{ 0, 'Q', "voronoi",           "", "", "", "", GMT_TP_STANDARD },
 	{ 0, '\0', "", "", "", "", "", 0 }  /* End of list marked with empty option and strings */
 };
 #endif  /* !SPHDISTANCE_INC_H */