1 files changed, 5 insertions, 6 deletions
diff --git a/utils/frame.c b/utils/frame.c
index 7fdb1637d..5aadb9687 100644
--- a/utils/frame.c
+++ b/utils/frame.c
@@ -910,7 +910,7 @@ int workloop( FILE *theinfile, FILE *theoutfile,
   return TRUE;      /* Input file done with, no errors. */
 }
 
-int chat( const char *format, ...)
+int __attribute__((format (printf,1,2))) chat( const char *format, ...)
 {
     va_list ap;
     int result = 0;
@@ -924,8 +924,7 @@ int chat( const char *format, ...)
     return result;
 }
 
-
-int inform( const char *format, ...)
+int __attribute__((format (printf,1,2))) inform( const char *format, ...)
 {
     va_list ap;
     int result = 0;
@@ -939,7 +938,7 @@ int inform( const char *format, ...)
     return result;
 }
 
-int error( const char *format, ...)
+int __attribute__((format (printf,1,2))) error( const char *format, ...)
 {
     va_list ap;
     int result;
@@ -950,7 +949,7 @@ int error( const char *format, ...)
     return result;
 }
 
-void fatalerror( const char *format, ...)
+void __attribute__((format (printf,1,2))) fatalerror( const char *format, ...)
 {
     va_list ap;
 
@@ -966,7 +965,7 @@ void fatalperror( const char *string)
   myexit( 1);
 }
 
-int say( const char *format, ...)
+int __attribute__((format (printf,1,2))) say( const char *format, ...)
 {
     va_list ap;
     int result;