diff --git a/lib/isc/include/isc/result.h b/lib/isc/include/isc/result.h
index 29262d6ad4..a53e14bc72 100644
--- a/lib/isc/include/isc/result.h
+++ b/lib/isc/include/isc/result.h
@@ -63,8 +63,9 @@
 #define ISC_R_FILEEXISTS		39
 #define ISC_R_NOTCONNECTED		40	/* socket is not connected */
 #define ISC_R_RANGE			41	/* out of range */
+#define ISC_R_ENTROPY			42	/* out of entropy */
 
-#define ISC_R_NRESULTS 			42	/* Number of results */
+#define ISC_R_NRESULTS 			43	/* Number of results */
 
 ISC_LANG_BEGINDECLS
 
diff --git a/lib/isc/result.c b/lib/isc/result.c
index 99a2b4d1c9..acea08dd8d 100644
--- a/lib/isc/result.c
+++ b/lib/isc/result.c
@@ -77,7 +77,8 @@ static const char *text[ISC_R_NRESULTS] = {
 	"file not found",			/* 38 */
 	"file already exists",			/* 39 */
 	"socket is not connected",		/* 40 */
-	"out of range"				/* 41 */
+	"out of range",				/* 41 */
+	"out of entropy"			/* 42 */
 };
 
 #define ISC_RESULT_RESULTSET			2