diff --git a/.local/bin/getbib b/.local/bin/getbib
index 557e349f..0d1a76e2 100755
--- a/.local/bin/getbib
+++ b/.local/bin/getbib
@@ -4,7 +4,7 @@
 if [ -f "$1" ]; then
 	# Try to get DOI from pdfinfo or pdftotext output.
 	doi=$(pdfinfo "$1" | grep -io "doi:.*") ||
-	doi=$(pdftotext "$1" 2>/dev/null - | grep -io "doi:.*" -m 1 | sed 's/ //g') ||
+	doi=$(pdftotext "$1" 2>/dev/null - | grep -io "doi:.*\s*\S*[0-9A-Za-z]" -m 1 ||
 	exit 1
 else
 	doi="$1"