diff --git a/help_diff.sh b/help_diff.sh
index 0f9c88f138..f90e3d007b 100755
--- a/help_diff.sh
+++ b/help_diff.sh
@@ -4,7 +4,7 @@
 # prints (stdout) only those messages which are missing from the help
 # file given as parameter ($1).
 #
-# Example: help_mp-en.sh help_mp-hu.h < help_mp-en.h > missing.h
+# Example: help_diff.sh help_mp-hu.h < help_mp-en.h > missing.h
 
 curr="x"
 
@@ -12,7 +12,7 @@ while read -r line ; do
 
 if ( echo $line | cut -d ' ' -f 1 | grep '^#define' > /dev/null ); then
     curr=`echo $line | cut -d ' ' -f 2`
-    if ( grep "$curr " $1 > /dev/null ); then
+    if ( grep " $curr " $1 > /dev/null ); then
 	curr="x"
     fi
 else