diff --git a/src/bef.c b/src/bef.c
index fa857e5..d87ee68 100644
--- a/src/bef.c
+++ b/src/bef.c
@@ -203,6 +203,7 @@
 void push (signed long val);
 signed long pop (void);
 void usage (void);
+int main (int, char **);
 
 /******************************************************* MAIN PROGRAM */
 
diff --git a/src/bef2c.c b/src/bef2c.c
index 3546204..a085424 100644
--- a/src/bef2c.c
+++ b/src/bef2c.c
@@ -115,6 +115,10 @@
 int labelrefs[8000];             /* postoptimization table */
 char s[255];
 char t[255];
+
+/********************************************************* PROTOTYPES */
+
+int main (int, char **);
 
 /******************************************************* MAIN PROGRAM */
 
diff --git a/src/befprof.c b/src/befprof.c
index 0e8b874..b9e766e 100644
--- a/src/befprof.c
+++ b/src/befprof.c
@@ -138,6 +138,7 @@
 
 void push (signed long val);
 signed long pop (void);
+int main (int, char **);
 
 /******************************************************* MAIN PROGRAM */