diff --git a/proc/slab.c b/proc/slab.c
index 66b0d4b5..c1e86248 100644
--- a/proc/slab.c
+++ b/proc/slab.c
@@ -313,13 +313,13 @@ int get_slabinfo(struct slab_info **list, struct slab_stat *stats)
 
 	if (!fgets(buffer, SLABINFO_VER_LEN, slabfile)) {
 		fprintf(stderr, "cannot read from slabinfo\n");
-		free(slabfile);
+		fclose(slabfile);
 		return 1;
 	}
 
 	if (sscanf(buffer, "slabinfo - version: %d.%d", &major, &minor) != 2) {
 		fprintf(stderr, "not the good old slabinfo we know\n");
-		free(slabfile);
+		fclose(slabfile);
 		return 1;
 	}
 
@@ -331,7 +331,7 @@ int get_slabinfo(struct slab_info **list, struct slab_stat *stats)
 		ret = parse_slabinfo10(list, stats, slabfile);
 	else {
 		fprintf(stderr, "unrecognizable slabinfo version\n");
-		free(slabfile);
+		fclose(slabfile);
 		return 1;
 	}