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-rw-r--r--converter/other/pstopnm.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/converter/other/pstopnm.c b/converter/other/pstopnm.c
index 94219c2c..95a97440 100644
--- a/converter/other/pstopnm.c
+++ b/converter/other/pstopnm.c
@@ -1037,6 +1037,11 @@ main(int argc, char ** argv) {
     borderedBox = addBorders(extractBox, cmdline.xborder, cmdline.yborder);
 
     computeSizeRes(cmdline, borderedBox, &imageDim);
+
+    if (imageDim.xres == 0)
+        imageDim.xres = 1;
+    if (imageDim.yres == 0)
+        imageDim.yres = 1;
     
     outfileArg = computeOutfileArg(cmdline);