diff --git a/Source/cmDependsJavaLexer.cxx b/Source/cmDependsJavaLexer.cxx
index 5951418b6..c37c2ff2f 100644
--- a/Source/cmDependsJavaLexer.cxx
+++ b/Source/cmDependsJavaLexer.cxx
@@ -690,6 +690,7 @@ Modify cmDependsJavaLexer.h:
 
 /* Disable features we do not need. */
 #define YY_NEVER_INTERACTIVE 1
+#undef ECHO /* SGI termios defines this differently. */
 #define ECHO
 
 /* Replace the lexer input function.  */
diff --git a/Source/cmDependsJavaLexer.in.l b/Source/cmDependsJavaLexer.in.l
index 7afc3233a..74671d1fe 100644
--- a/Source/cmDependsJavaLexer.in.l
+++ b/Source/cmDependsJavaLexer.in.l
@@ -54,6 +54,7 @@ Modify cmDependsJavaLexer.h:
 
 /* Disable features we do not need. */
 #define YY_NEVER_INTERACTIVE 1
+#undef ECHO /* SGI termios defines this differently. */
 #define ECHO
 
 /* Replace the lexer input function.  */