diff --git a/src/libiir/400_parser.c b/src/libiir/400_parser.c
index 45b44da..ccbff97 100644
--- a/src/libiir/400_parser.c
+++ b/src/libiir/400_parser.c
@@ -382,7 +382,7 @@ iir_parse_n(const char* desc, int n)
 
     a = malloc(sizeof(struct iir_filter_t*) * n);
     a[0] = fi;
-    for(i = 1; i < n; ++i) a[n] = iir_filter_copy(fi, 0);
+    for(i = 1; i < n; ++i) a[i] = iir_filter_copy(fi, 0);
 
     return a;
 }