--- lib-src/libnyquist/xlisp/xlbfun.c
+++ lib-src/libnyquist/xlisp/xlbfun.c
@@ -603,6 +603,7 @@
 {
     xllastarg();
     xlcleanup();
+    return (NIL);
 }
 
 /* xtoplevel - special form 'top-level' */
@@ -610,6 +611,7 @@
 {
     xllastarg();
     xltoplevel();
+    return (NIL);
 }
 
 /* xcontinue - special form 'continue' */
@@ -617,6 +619,7 @@
 {
     xllastarg();
     xlcontinue();
+    return (NIL);
 }
 
 /* xevalhook - eval hook function */
--- lib-src/libnyquist/xlisp/xlread.c
+++ lib-src/libnyquist/xlisp/xlread.c
@@ -240,6 +240,8 @@
     /* handle illegal characters */
     else
         xlerror("illegal character",cvfixnum((FIXTYPE)ch));
+
+    return (FALSE);
 }
 
 /* rmhash - read macro for '#' */