fixed typo

diff --git a/doc/tutorial/ginac.texi b/doc/tutorial/ginac.texi
index f1a88ebd7f43813e156303781ad58b0ff9d8257a..f9bd79131451dde72a9477afdce0f0f00613f321 100644 (file)
--- a/doc/tutorial/ginac.texi
+++ b/doc/tutorial/ginac.texi
@@ -7394,6 +7394,7 @@ The following shows how to build a simple package using automake
 and the @samp{AM_PATH_GINAC} macro. The program used here is @file{simple.cpp}:
 
 @example
+#include <iostream>
 #include <ginac/ginac.h>
 
 int main()