diff --git a/ext/standard/image.c b/ext/standard/image.c
index 9deb5a8a7401b..5cd95ad4001c2 100644
--- a/ext/standard/image.c
+++ b/ext/standard/image.c
@@ -1186,7 +1186,7 @@ PHPAPI char * php_image_type_to_mime_type(int image_type)
 		case IMAGE_FILETYPE_PSD:
 			return "image/psd";
 		case IMAGE_FILETYPE_BMP:
-			return "image/x-ms-bmp";
+			return "image/bmp";
 		case IMAGE_FILETYPE_TIFF_II:
 		case IMAGE_FILETYPE_TIFF_MM:
 			return "image/tiff";
diff --git a/ext/standard/tests/image/getimagesize.phpt b/ext/standard/tests/image/getimagesize.phpt
index eefa331ea5d65..1164f10c3e7ae 100644
--- a/ext/standard/tests/image/getimagesize.phpt
+++ b/ext/standard/tests/image/getimagesize.phpt
@@ -37,7 +37,7 @@ array(16) {
     ["bits"]=>
     int(24)
     ["mime"]=>
-    string(14) "image/x-ms-bmp"
+    string(9) "image/bmp"
   }
   ["test12pix.webp"]=>
   array(6) {
@@ -67,7 +67,7 @@ array(16) {
     ["bits"]=>
     int(32)
     ["mime"]=>
-    string(14) "image/x-ms-bmp"
+    string(9) "image/bmp"
   }
   ["test1pix.bmp"]=>
   array(6) {
@@ -82,7 +82,7 @@ array(16) {
     ["bits"]=>
     int(24)
     ["mime"]=>
-    string(14) "image/x-ms-bmp"
+    string(9) "image/bmp"
   }
   ["test1pix.jp2"]=>
   array(7) {
diff --git a/ext/standard/tests/image/getimagesize_basic.phpt b/ext/standard/tests/image/getimagesize_basic.phpt
index 4d472258180a2..63ae334066ad1 100644
--- a/ext/standard/tests/image/getimagesize_basic.phpt
+++ b/ext/standard/tests/image/getimagesize_basic.phpt
@@ -138,7 +138,7 @@ array(6) {
   ["bits"]=>
   int(24)
   ["mime"]=>
-  string(14) "image/x-ms-bmp"
+  string(9) "image/bmp"
 }
 array(0) {
 }
diff --git a/ext/standard/tests/image/image_type_to_mime_type.phpt b/ext/standard/tests/image/image_type_to_mime_type.phpt
index 4ae56802389a8..38a90c1bb33f7 100644
--- a/ext/standard/tests/image/image_type_to_mime_type.phpt
+++ b/ext/standard/tests/image/image_type_to_mime_type.phpt
@@ -27,13 +27,13 @@ image_type_to_mime_type()
 --EXPECT--
 array(16) {
   ["test-1pix.bmp"]=>
-  string(14) "image/x-ms-bmp"
+  string(9) "image/bmp"
   ["test12pix.webp"]=>
   string(10) "image/webp"
   ["test1bpix.bmp"]=>
-  string(14) "image/x-ms-bmp"
+  string(9) "image/bmp"
   ["test1pix.bmp"]=>
-  string(14) "image/x-ms-bmp"
+  string(9) "image/bmp"
   ["test1pix.jp2"]=>
   string(9) "image/jp2"
   ["test1pix.jpc"]=>
diff --git a/ext/standard/tests/image/image_type_to_mime_type_basic.phpt b/ext/standard/tests/image/image_type_to_mime_type_basic.phpt
index 5506570494f32..9ee91961c243d 100644
--- a/ext/standard/tests/image/image_type_to_mime_type_basic.phpt
+++ b/ext/standard/tests/image/image_type_to_mime_type_basic.phpt
@@ -49,7 +49,7 @@ string(10) "image/jpeg"
 string(9) "image/png"
 string(29) "application/x-shockwave-flash"
 string(9) "image/psd"
-string(14) "image/x-ms-bmp"
+string(9) "image/bmp"
 string(10) "image/tiff"
 string(10) "image/tiff"
 string(24) "application/octet-stream"
diff --git a/ext/standard/tests/image/image_type_to_mime_type_variation3.phpt b/ext/standard/tests/image/image_type_to_mime_type_variation3.phpt
index 7b06c0a145b65..1b4f418cdbd1b 100644
--- a/ext/standard/tests/image/image_type_to_mime_type_variation3.phpt
+++ b/ext/standard/tests/image/image_type_to_mime_type_variation3.phpt
@@ -39,7 +39,7 @@ string\(29\) "application\/x-shockwave-flash"
 string\(9\) "image\/psd"
 
 -- Iteration 6 --
-string\(14\) "image\/x-ms-bmp"
+string\(9\) "image\/bmp"
 
 -- Iteration 7 --
 string\(10\) "image\/tiff"