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diff --git a/magic/Magdir/images b/magic/Magdir/images
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index e94905c..a25d292 100644
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--- a/magic/Magdir/images
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+++ b/magic/Magdir/images
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@@ -32,17 +32,42 @@
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 # PBMPLUS images
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 # The next byte following the magic is always whitespace.
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-0	search/1	P1		Netpbm PBM image text
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+# strength is changed to try these patterns before "x86 boot sector"
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+0	search/1	P1		
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+>3	regex		=[0-9]*\ [0-9]*		Netpbm PBM image text
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+>3	regex		=[0-9]+\ 		\b, size = %sx
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+>>3	regex		=\ [0-9]+	\b%s
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+!:strength + 45
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 !:mime	image/x-portable-bitmap
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-0	search/1b	P2		Netpbm PGM image text
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+0	search/1	P2		
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+>3	regex		=[0-9]*\ [0-9]*		Netpbm PGM image text
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+>3	regex		=[0-9]+\ 		\b, size = %sx
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+>>3	regex		=\ [0-9]+	\b%s
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+!:strength + 45
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 !:mime	image/x-portable-greymap
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 0	search/1	P3		Netpbm PPM image text
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+>3	regex		=[0-9]*\ [0-9]*		Netpbm PPM image text
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+>3	regex		=[0-9]+\ 		\b, size = %sx
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+>>3	regex		=\ [0-9]+	\b%s
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+!:strength + 45
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 !:mime	image/x-portable-pixmap
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-0	string		P4		Netpbm PBM "rawbits" image data
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+0	string		P4		
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+>3	regex		=[0-9]*\ [0-9]*		Netpbm PBM "rawbits" image data
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+>3	regex		=[0-9]+\ 		\b, size = %sx
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+>>3	regex		=\ [0-9]+	\b%s
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+!:strength + 45
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 !:mime	image/x-portable-bitmap
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-0	string		P5		Netpbm PGM "rawbits" image data
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+0	string		P5		
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+>3	regex		=[0-9]*\ [0-9]*		Netpbm PGM "rawbits" image data
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+>3	regex		=[0-9]+\ 		\b, size = %sx
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+>>3	regex		=\ [0-9]+	\b%s
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+!:strength + 45
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 !:mime	image/x-portable-greymap
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-0	string		P6		Netpbm PPM "rawbits" image data
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+0	string		P6		
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+>3	regex		=[0-9]*\ [0-9]*		Netpbm PPM "rawbits" image data
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+>3	regex		=[0-9]+\ 		\b, size = %sx
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+>>3	regex		=\ [0-9]+	\b%s
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+!:strength + 45
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 !:mime	image/x-portable-pixmap
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 0	string		P7		Netpbm PAM image file
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 !:mime	image/x-portable-pixmap