diff --git a/src/basic/vx_util/util_constants.h b/src/basic/vx_util/util_constants.h
index 2200bded36..24ed650a80 100644
--- a/src/basic/vx_util/util_constants.h
+++ b/src/basic/vx_util/util_constants.h
@@ -56,6 +56,7 @@ static const char mercator_proj_type       [] = "Mercator";
 static const char lambert_proj_type        [] = "Lambert Conformal";
 static const char stereographic_proj_type  [] = "Polar Stereographic";
 static const char gaussian_proj_type       [] = "Gaussian";
+static const char semilatlon_proj_type     [] = "SemiLatLon";
 
 // String containing all valid PrepBufr message types
 static const char vld_msg_typ_str[] =