diff --git a/demos/auth.c b/demos/auth.c
index eed4fde9..fabc58f4 100644
--- a/demos/auth.c
+++ b/demos/auth.c
@@ -63,8 +63,7 @@ auth(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
+    init();
 
     return auth() != 0;
 }
diff --git a/demos/box.c b/demos/box.c
index e69460b6..a2629140 100644
--- a/demos/box.c
+++ b/demos/box.c
@@ -114,8 +114,7 @@ box(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
+    init();
 
     return box() != 0;
 }
diff --git a/demos/generichash.c b/demos/generichash.c
index 6c0508f5..ecb26d17 100644
--- a/demos/generichash.c
+++ b/demos/generichash.c
@@ -45,9 +45,8 @@ generichash(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
-
+    init();
     generichash();
+
     return 0;
 }
diff --git a/demos/generichashstream.c b/demos/generichashstream.c
index 08d840ce..6f8e2119 100644
--- a/demos/generichashstream.c
+++ b/demos/generichashstream.c
@@ -55,9 +55,8 @@ generichashstream(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
-
+    init();
     generichashstream();
+
     return 0;
 }
diff --git a/demos/onetimeauth.c b/demos/onetimeauth.c
index 7e8f193a..e344dc64 100644
--- a/demos/onetimeauth.c
+++ b/demos/onetimeauth.c
@@ -65,8 +65,7 @@ onetimeauth(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
+    init();
 
     return onetimeauth() != 0;
 }
diff --git a/demos/shorthash.c b/demos/shorthash.c
index a0317edc..d567b6c8 100644
--- a/demos/shorthash.c
+++ b/demos/shorthash.c
@@ -42,9 +42,8 @@ shorthash(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
-
+    init();
     shorthash();
+
     return 0;
 }
diff --git a/demos/sign.c b/demos/sign.c
index a7132790..6107c642 100644
--- a/demos/sign.c
+++ b/demos/sign.c
@@ -83,8 +83,7 @@ sign(void)
 int
 main(void)
 {
-    sodium_init();
-    printf("Using LibSodium %s\n", sodium_version_string());
+    init();
 
     return sign() != 0;
 }
diff --git a/demos/utils.c b/demos/utils.c
index 1a1fe429..a24b68e4 100644
--- a/demos/utils.c
+++ b/demos/utils.c
@@ -74,3 +74,10 @@ print_verification(int r)
     else
         puts("Failure\n");
 }
+
+void
+init(void)
+{
+    sodium_init();
+    printf("Using libsodium %s\n", sodium_version_string());
+}
diff --git a/demos/utils.h b/demos/utils.h
index bd915cdd..d6890d16 100644
--- a/demos/utils.h
+++ b/demos/utils.h
@@ -1,15 +1,19 @@
 /*
  * Utility functions shared by all the demo programs.
  */
-#ifndef DEMO_UTILS_H
-#define DEMO_UTILS_H
+#ifndef UTILS_H
+#define UTILS_H
 
 #include <stddef.h>
 
 #define MAX_INPUT_SIZE 4096 /* max size of all input buffers in the demo */
 
 void print_hex(const void *bin, const size_t bin_len);
+
 size_t prompt_input(char *prompt, char *input, const size_t max_input_len);
+
 void print_verification(int r);
 
-#endif /* DEMO_UTILS_H */
+void init(void);
+
+#endif /* UTILS_H */