diff --git a/examples/main.c b/examples/main.c
index b01dce41ee85f34409eae3b14b51d44cd69854dc..66bbab458233dcd794adec7e01f7de441d97dbdc 100644
--- a/examples/main.c
+++ b/examples/main.c
@@ -749,7 +749,7 @@ int main(int argc, char *argv[]) {
     }
 #else
     if (!with_cooling && !with_temperature) {
-      error("ERROR: Compiled with cooling but running without it."
+      error("ERROR: Compiled with cooling but running without it. "
 	    "Did you forget the --cooling or --temperature flags?");
     }
 #endif