diff --git a/make-includes/build_content_rules.make b/make-includes/build_content_rules.make
index 798256b..72b9304 100755
--- a/make-includes/build_content_rules.make
+++ b/make-includes/build_content_rules.make
@@ -108,6 +108,10 @@
 #   is just plain impossible). The help suggests using this if
 #   "BoundingBox in output seems to be wrong". I think this counts :)
 #
+#   ps2eps seems to have a problem with determining the bounding box of one
+#   of the graphics files (the St Germain ERD), which is solved by passing the
+#   --gsbbox option.
+#
 # Notes on gs options:
 #
 #   -dEPSCrop forces gs to crop the EPS image to its bounding box. If not
@@ -121,12 +125,12 @@
 #
 %-print.pdf: %.eps
 	@announce "Generating $@ (print)"
-	@ps2eps --ignoreBB --nohires --loose < $< | ps2pdf -dEPSCrop - $@
+	@ps2eps --ignoreBB --nohires --loose --gsbbox < $< | ps2pdf -dEPSCrop - $@
 	@mv $@ $(BUILD_DIR)
 
 %-print.pdf: %.ps
 	@announce "Generating $@ (print)"
-	@ps2eps --ignoreBB --nohires --loose < $< | ps2pdf -dEPSCrop - $@
+	@ps2eps --ignoreBB --nohires --loose --gsbbox < $< | ps2pdf -dEPSCrop - $@
 	@mv $@ $(BUILD_DIR)
 
 
@@ -149,14 +153,14 @@
 #
 %-web.png: %.eps
 	@announce "Generating $@ (web)"
-	@ps2eps --ignoreBB --nohires --loose < $< | \
+	@ps2eps --ignoreBB --nohires --loose --gsbbox < $< | \
 		gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dEPSCrop -r96 \
 		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ -
 	@mv $@ $(BUILD_DIR)
 
 %-web.png: %.ps
 	@announce "Generating $@ (web)"
-	@ps2eps --ignoreBB --nohires --loose < $< | \
+	@ps2eps --ignoreBB --nohires --loose --gsbbox < $< | \
 		gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dEPSCrop -r96 \
 		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ -
 	@mv $@ $(BUILD_DIR)
@@ -165,14 +169,14 @@
 #
 %-web-zoom.png: %.eps
 	@announce "Generating $@ (zoomed web)"
-	@ps2eps --ignoreBB --nohires --loose < $< | \
+	@ps2eps --ignoreBB --nohires --loose --gsbbox < $< | \
 		gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dEPSCrop -r144 \
 		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ -
 	@mv $@ $(BUILD_DIR)
 
 %-web-zoom.png: %.ps
 	@announce "Generating $@ (zoomed web)"
-	@ps2eps --ignoreBB --nohires --loose < $< | \
+	@ps2eps --ignoreBB --nohires --loose --gsbbox < $< | \
 		gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dEPSCrop -r144 \
 		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ -
 	@mv $@ $(BUILD_DIR)