diff --git a/source/m3_api_libc.c b/source/m3_api_libc.c
index e0c1b18..1c9649a 100644
--- a/source/m3_api_libc.c
+++ b/source/m3_api_libc.c
@@ -180,7 +180,12 @@ m3ApiRawFunction(m3_libc_clock_ms)
 {
     m3ApiReturnType (uint32_t)
 #ifdef CLOCKS_PER_SEC
-    m3ApiReturn(clock() / (CLOCKS_PER_SEC/1000));
+    uint32_t clock_divider = CLOCKS_PER_SEC/1000;
+    if (clock_divider != 0) {
+        m3ApiReturn(clock() / clock_divider);
+    } else {
+        m3ApiReturn(clock());
+    }
 #else
     m3ApiReturn(clock());
 #endif