diff --git a/spec/oglgpuprog.lua b/spec/oglgpuprog.lua
index 54da9860f2..a224494fbb 100644
--- a/spec/oglgpuprog.lua
+++ b/spec/oglgpuprog.lua
@@ -41,6 +41,7 @@ return {
 		NOT NRM OR PK2H PK2US PK4B PK4UB POW RCC RCP REP RET RFL ROUND RSQ SAD
 		SCS SEQ SFL SGE SGT SHL SHR SIN SLE SLT SNE SSG STR SUB SWZ TEX TRUNC LOOP
 		TXB TXD TXF TXL TXP TXQ UP2H UP2US UP4B UP4UB X2D XOR XPD REP.S REP.F REP.U
+		ENDLOOP
 
 		ABS_SAT ADD_SAT CEIL_SAT CMP_SAT COS_SAT DIV_SAT DP2_SAT DP2A_SAT DP3_SAT
 		DP4_SAT DPH_SAT DST_SAT EX2_SAT FLR_SAT FRC_SAT LG2_SAT LIT_SAT LRP_SAT
diff --git a/tools/cg.lua b/tools/cg.lua
index b1ba99247a..2962737665 100644
--- a/tools/cg.lua
+++ b/tools/cg.lua
@@ -178,10 +178,10 @@ return cgbinpath and {
 			local indent = 0
 			local maxindent = 0
 			local startindent = {
-				"IF","REP","ELSE",
+				"IF","REP","ELSE","LOOP",
 			}
 			local endindent = {
-				"ENDIF","ENDREP","ELSE","END",
+				"ENDIF","ENDREP","ELSE","ENDLOOP","END",
 			}
 
 			local function checknesting(str,tab)