diff --git a/commands/elvis/tmp.c b/commands/elvis/tmp.c
index 77ae0ef88..9102169d8 100755
--- a/commands/elvis/tmp.c
+++ b/commands/elvis/tmp.c
@@ -367,6 +367,9 @@ int tmpstart(filename)
 				}
 				nbytes++;
 			}
+			if(i >= MAXBLKS) {
+				FAIL("Too many blocks: %d.", i);
+			}
 			lnum[i - 1] = nlines;
 		}
 FoundEOF: