diff --git a/code/game/objects/items/devices/scanners.dm b/code/game/objects/items/devices/scanners.dm
index b48682a763a..d74c79e4513 100644
--- a/code/game/objects/items/devices/scanners.dm
+++ b/code/game/objects/items/devices/scanners.dm
@@ -207,14 +207,15 @@ BREATH ANALYZER
 			if(-(INFINITY) to BLOOD_VOLUME_SURVIVE)
 				blood_volume_string = "<span class='scan_danger'>\<[BLOOD_VOLUME_SURVIVE]%</span>"
 
-		var/oxygenation_string = "<span class='scan_green'>[H.get_blood_oxygenation()]%</span>"
-		switch(H.get_blood_oxygenation())
+		var/oxygenation = H.get_blood_oxygenation()
+		var/oxygenation_string = "<span class='scan_green'>[oxygenation]]%</span>"
+		switch(oxygenation)
 			if(BLOOD_VOLUME_OKAY to BLOOD_VOLUME_SAFE)
-				oxygenation_string = "<span class='scan_notice'>[oxygenation_string]%</span>"
+				oxygenation_string = "<span class='scan_notice'>[oxygenation]%</span>"
 			if(BLOOD_VOLUME_SURVIVE to BLOOD_VOLUME_OKAY)
-				oxygenation_string = "<span class='scan_warning'>[oxygenation_string]%</span>"
+				oxygenation_string = "<span class='scan_warning'>[oxygenation]%</span>"
 			if(-(INFINITY) to BLOOD_VOLUME_SURVIVE)
-				oxygenation_string = "<span class='scan_danger'>[oxygenation_string]%</span>"
+				oxygenation_string = "<span class='scan_danger'>[oxygenation]%</span>"
 		if(H.status_flags & FAKEDEATH)
 			oxygenation_string = "<span class='scan_danger'>[rand(0,10)]%</span>"
 		dat += "Blood pressure: [blood_pressure_string]"
diff --git a/html/changelogs/mattatlas-scanfix.yml b/html/changelogs/mattatlas-scanfix.yml
new file mode 100644
index 00000000000..8302b5a8b22
--- /dev/null
+++ b/html/changelogs/mattatlas-scanfix.yml
@@ -0,0 +1,41 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes:
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#   admin
+#   backend
+#   security
+#   refactor
+#################################
+
+# Your name.
+author: MattAtlas
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes:
+  - bugfix: "Fixes the health scanner displaying two percentage signs for blood oxygenation."