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diff --git a/tools/ddjvu.cpp b/tools/ddjvu.cpp
index 7109952..b41f7d2 100644
--- a/tools/ddjvu.cpp
+++ b/tools/ddjvu.cpp
@@ -70,6 +70,7 @@
#include <locale.h>
#include <fcntl.h>
#include <errno.h>
+#include <stdint.h>
#ifdef UNIX
# include <sys/time.h>
@@ -394,7 +395,9 @@ render(ddjvu_page_t *page, int pageno)
rowsize = rrect.w;
else
rowsize = rrect.w * 3;
- if (! (image = (char*)malloc(rowsize * rrect.h)))
+ if ((size_t)rowsize > SIZE_MAX / rrect.h)
+ die(i18n("Integer overflow when allocating image buffer for page %d"), pageno);
+ if (! (image = (char*)malloc((size_t)rowsize * rrect.h)))
die(i18n("Cannot allocate image buffer for page %d"), pageno);
/* Render */
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