Index: src/Parser/lex.ll
===================================================================
--- src/Parser/lex.ll	(revision e319fc52866340c9ab388498d1f0e9aec5c25fc3)
+++ src/Parser/lex.ll	(revision 1f3d2124e67bdfe517c68a9121cdb0013b8e3780)
@@ -10,6 +10,6 @@
  * Created On       : Sat Sep 22 08:58:10 2001
  * Last Modified By : Peter A. Buhr
- * Last Modified On : Sat Jun 19 15:23:05 2021
- * Update Count     : 758
+ * Last Modified On : Sun Jun 20 18:41:09 2021
+ * Update Count     : 759
  */
 
@@ -235,7 +235,7 @@
 continue		{ KEYWORD_RETURN(CONTINUE); }
 coroutine		{ KEYWORD_RETURN(COROUTINE); }			// CFA
-_Decimal32		{ KEYWORD_RETURN(FLOAT); }				// GCC
-_Decimal64		{ KEYWORD_RETURN(DOUBLE); }				// GCC
-_Decimal128		{ KEYWORD_RETURN(uuFLOAT128); }			// GCC
+_Decimal32		{ KEYWORD_RETURN(DECIMAL32); }			// GCC
+_Decimal64		{ KEYWORD_RETURN(DECIMAL64); }			// GCC
+_Decimal128		{ KEYWORD_RETURN(DECIMAL128); }			// GCC
 default			{ KEYWORD_RETURN(DEFAULT); }
 disable			{ KEYWORD_RETURN(DISABLE); }			// CFA
Index: src/Parser/parser.yy
===================================================================
--- src/Parser/parser.yy	(revision e319fc52866340c9ab388498d1f0e9aec5c25fc3)
+++ src/Parser/parser.yy	(revision 1f3d2124e67bdfe517c68a9121cdb0013b8e3780)
@@ -10,6 +10,6 @@
 // Created On       : Sat Sep  1 20:22:55 2001
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Wed May 19 14:20:36 2021
-// Update Count     : 5022
+// Last Modified On : Sun Jun 20 18:46:51 2021
+// Update Count     : 5023
 //
 
@@ -269,4 +269,5 @@
 %token INT128 UINT128 uuFLOAT80 uuFLOAT128				// GCC
 %token uFLOAT16 uFLOAT32 uFLOAT32X uFLOAT64 uFLOAT64X uFLOAT128 // GCC
+%token DECIMAL32 DECIMAL64 DECIMAL128					// GCC
 %token ZERO_T ONE_T										// CFA
 %token SIZEOF TYPEOF VALIST AUTO_TYPE					// GCC
@@ -1891,4 +1892,10 @@
 	| uFLOAT128
 		{ $$ = DeclarationNode::newBasicType( DeclarationNode::uFloat128 ); }
+	| DECIMAL32
+		{ SemanticError( yylloc, "_Decimal32 is currently unimplemented." ); $$ = nullptr; }
+	| DECIMAL64
+		{ SemanticError( yylloc, "_Decimal64 is currently unimplemented." ); $$ = nullptr; }
+	| DECIMAL128
+		{ SemanticError( yylloc, "_Decimal128 is currently unimplemented." ); $$ = nullptr; }
 	| COMPLEX											// C99
 		{ $$ = DeclarationNode::newComplexType( DeclarationNode::Complex ); }