I have a makefile such that when I type the 'make' command I get this error:

make: Fatal error in reader: makefile, line 5: Unexpected end of line seen

I just can't seem to understand where the error lies.
Is there a UNIX help file that describes what this error means?
Where can I go to find out what it means?
Can someone tell me what it means perhaps?

Here is the code up to line 5.

Code:
     1  # pe4 makefile
     2
     3   frodo.exe : main.o initialize.o empty.o full.o insert.o remov.o
     4      gcc -o frodo.exe main.o initialize.o empty.o full.o insert.o remov.o
     5
I can individually compile each of the source files and object file. In fact, I can create the a.out file just fine using line 4 (without the frodo.exe), and the program runs how it is supposed to. The makefile however is not cooperating. Please help if you can!