diff --git a/modules/libpr0n/build/Makefile.in b/modules/libpr0n/build/Makefile.in
--- a/modules/libpr0n/build/Makefile.in
+++ b/modules/libpr0n/build/Makefile.in
@@ -82,18 +82,17 @@ EXTRA_DSO_LDOPTS = \
 		$(MOZ_COMPONENT_LIBS) \
 		$(NULL)
 
 # Force a rebuild of nsImageModule when either of MOZ_IMG_{DE,EN}CODERS changes
 
 GARBAGE += _img_list nsImgBuildDefines.h
 
 export::
-	{ \
-	$(foreach d,$(MOZ_IMG_ENCODERS), \
+	{ $(foreach d,$(MOZ_IMG_ENCODERS), \
 		echo "#define IMG_BUILD_ENCODER_${d}" ; ) \
 	} > nsImgBuildDefines.tmp
 	@if `cmp -s nsImgBuildDefines.h nsImgBuildDefines.tmp`; then \
 		rm -f nsImgBuildDefines.tmp; \
 	else \
 		rm -f nsImgBuildDefines.h; \
 		mv nsImgBuildDefines.tmp nsImgBuildDefines.h; \
 	fi