diff --git a/mex/build/octave/bytecode/Makefile.am b/mex/build/octave/bytecode/Makefile.am
index 549f73e8e..f55d24f32 100644
--- a/mex/build/octave/bytecode/Makefile.am
+++ b/mex/build/octave/bytecode/Makefile.am
@@ -1,3 +1,3 @@
-EXEXET = .mex
+EXEEXT = .mex
 include ../mex.am
 include ../../bytecode.am