diff --git a/src/cmd/5l/obj.c b/src/cmd/5l/obj.c
index 47831e39c6..8ecc23821e 100644
--- a/src/cmd/5l/obj.c
+++ b/src/cmd/5l/obj.c
@@ -647,7 +647,7 @@ loop:
 	case APTRS:
 		if(skip)
 			goto casedef;
-		if(cursym->nptrs == -1 || cursym->ptrs == NULL) {
+		if(cursym->nptrs == -1 || cursym->ptrs == nil) {
 			diag("ldobj1: pointer map data provided for %s without a definition", cursym->name);
 			errorexit();
 		}
diff --git a/src/cmd/6l/obj.c b/src/cmd/6l/obj.c
index b4e77388d5..0fcafd7018 100644
--- a/src/cmd/6l/obj.c
+++ b/src/cmd/6l/obj.c
@@ -636,7 +636,7 @@ loop:
 	case APTRS:
 		if(skip)
 			goto casdef;
-		if(cursym->nptrs == -1 || cursym->ptrs == NULL) {
+		if(cursym->nptrs == -1 || cursym->ptrs == nil) {
 			diag("ldobj1: pointer map data provided for %s without a definition", cursym->name);
 			errorexit();
 		}
diff --git a/src/cmd/8l/obj.c b/src/cmd/8l/obj.c
index b5fa256f2b..1cc0444c4b 100644
--- a/src/cmd/8l/obj.c
+++ b/src/cmd/8l/obj.c
@@ -646,7 +646,7 @@ loop:
 	case APTRS:
 		if(skip)
 			goto casdef;
-		if(cursym->nptrs == -1 || cursym->ptrs == NULL) {
+		if(cursym->nptrs == -1 || cursym->ptrs == nil) {
 			diag("ldobj1: pointer map data provided for %s without a definition", cursym->name);
 			errorexit();
 		}