diff --git a/engine/compiler.c b/engine/compiler.c
index 7f2e802..cc9c331 100644
--- a/engine/compiler.c
+++ b/engine/compiler.c
@@ -3419,7 +3419,7 @@ loop:
 	iFlags |= PH7_CLASS_ATTR_CONSTANT;
 	if(pGen->pIn >= pGen->pEnd || (pGen->pIn->nType & PH7_TK_ID) == 0) {
 		/* Invalid constant name */
-		rc = PH7_GenCompileError(pGen, E_ERROR, nLine, "Invalid constant name");
+		rc = PH7_GenCompileError(pGen, E_ERROR, nLine, "Invalid constant name '%z' in class '%z'", &pGen->pIn->sData, pClass->sName);
 		if(rc == SXERR_ABORT) {
 			/* Error count limit reached,abort immediately */
 			return SXERR_ABORT;