diff --git a/proj/intercept/src/intercept.c b/proj/intercept/src/intercept.c
index fe2a6fc..89606cb 100644
--- a/proj/intercept/src/intercept.c
+++ b/proj/intercept/src/intercept.c
@@ -887,7 +887,7 @@ static void init(void) {
         intercept = STDERR_FILENO;
         mode = 2;
     } else if (val && strncmp(val, "file:", 5) == 0) {
-        if ((intercept = open(val + 5, O_CREAT | O_TRUNC | O_WRONLY, 0644)) == -1) {
+        if ((intercept = open(val + 5, O_CREAT | O_APPEND | O_WRONLY, 0644)) == -1) {
             fprintf(stderr, "intercept: unable to open log file '%s': %s\n" "intercept: not logging or manipulating function/system calls\n", val + 5, strerror(errno));
             errno = 0;
             mode = -1;