diff --git a/src/lib/safeclib.c b/src/lib/safeclib.c
index 1c5cf28c6..7f8f79eb2 100644
--- a/src/lib/safeclib.c
+++ b/src/lib/safeclib.c
@@ -51,6 +51,17 @@ lumiera_calloc (size_t n, size_t size)
 }
 
 
+void*
+lumiera_realloc (void* ptr, size_t size)
+{
+  void* o = size ? realloc (ptr, size) : NULL;
+  if (!o)
+    LUMIERA_DIE (NO_MEMORY);
+
+  return o;
+}
+
+
 char*
 lumiera_strndup (const char* str, size_t len)
 {
diff --git a/src/lib/safeclib.h b/src/lib/safeclib.h
index 79f10d024..d949595f8 100644
--- a/src/lib/safeclib.h
+++ b/src/lib/safeclib.h
@@ -50,6 +50,16 @@ void*
 lumiera_calloc (size_t n, size_t size);
 
 
+/**
+ * Change the size of a memory block.
+ * @param ptr pointer to the old memory block obtained by lumiera_malloc or lumiera_calloc
+ * @param size new size of the block
+ * @return address of new block
+ */
+void*
+lumiera_realloc (void* ptr, size_t size);
+
+
 /**
  * Free previously allocated memory.
  * @param mem pointer to the memory block obtained by lumiera_malloc or lumiera_calloc