diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
index e146f4da9..43801b1f6 100644
--- a/src/PIL/BmpImagePlugin.py
+++ b/src/PIL/BmpImagePlugin.py
@@ -347,6 +347,6 @@ def _save(im, fp, filename):
 Image.register_open(BmpImageFile.format, BmpImageFile, _accept)
 Image.register_save(BmpImageFile.format, _save)
 
-Image.register_extension(BmpImageFile.format, ".bmp")
+Image.register_extensions(BmpImageFile.format, [".bmp", ".dib"])
 
 Image.register_mime(BmpImageFile.format, "image/bmp")
diff --git a/src/PIL/IcoImagePlugin.py b/src/PIL/IcoImagePlugin.py
index 589ef3cc2..24c4bddca 100644
--- a/src/PIL/IcoImagePlugin.py
+++ b/src/PIL/IcoImagePlugin.py
@@ -293,3 +293,5 @@ class IcoImageFile(ImageFile.ImageFile):
 Image.register_open(IcoImageFile.format, IcoImageFile, _accept)
 Image.register_save(IcoImageFile.format, _save)
 Image.register_extension(IcoImageFile.format, ".ico")
+
+Image.register_mime(IcoImageFile.format, "image/x-icon")
diff --git a/src/PIL/PcxImagePlugin.py b/src/PIL/PcxImagePlugin.py
index daa58b3f3..bf55a88a3 100644
--- a/src/PIL/PcxImagePlugin.py
+++ b/src/PIL/PcxImagePlugin.py
@@ -177,3 +177,5 @@ Image.register_open(PcxImageFile.format, PcxImageFile, _accept)
 Image.register_save(PcxImageFile.format, _save)
 
 Image.register_extension(PcxImageFile.format, ".pcx")
+
+Image.register_mime(PcxImageFile.format, "image/x-pcx")
diff --git a/src/PIL/PpmImagePlugin.py b/src/PIL/PpmImagePlugin.py
index 8002678fb..c4183d311 100644
--- a/src/PIL/PpmImagePlugin.py
+++ b/src/PIL/PpmImagePlugin.py
@@ -155,4 +155,4 @@ def _save(im, fp, filename):
 Image.register_open(PpmImageFile.format, PpmImageFile, _accept)
 Image.register_save(PpmImageFile.format, _save)
 
-Image.register_extensions(PpmImageFile.format, [".pbm", ".pgm", ".ppm"])
+Image.register_extensions(PpmImageFile.format, [".pbm", ".pgm", ".ppm", ".pnm"])
diff --git a/src/PIL/TgaImagePlugin.py b/src/PIL/TgaImagePlugin.py
index c266d50c1..4c9bbc886 100644
--- a/src/PIL/TgaImagePlugin.py
+++ b/src/PIL/TgaImagePlugin.py
@@ -224,4 +224,6 @@ def _save(im, fp, filename):
 Image.register_open(TgaImageFile.format, TgaImageFile)
 Image.register_save(TgaImageFile.format, _save)
 
-Image.register_extension(TgaImageFile.format, ".tga")
+Image.register_extensions(TgaImageFile.format, [".tga", ".icb", ".vda", ".vst"])
+
+Image.register_mime(TgaImageFile.format, "image/x-tga")