diff --git a/openrtx/include/core/voicePrompts.h b/openrtx/include/core/voicePrompts.h
index ba95b733..31c2b7cd 100644
--- a/openrtx/include/core/voicePrompts.h
+++ b/openrtx/include/core/voicePrompts.h
@@ -254,7 +254,7 @@ typedef enum
     vpGPSAltitude = 0x40,
     vpGPSDirection = 0x80,
     vpGPSSatCount = 0x100,
-    vpGPSAll = 0xff,
+    vpGPSAll = 0x1ff,
 } 
 vpGPSInfoFlags_t;
 
diff --git a/openrtx/src/core/voicePromptUtils.c b/openrtx/src/core/voicePromptUtils.c
index df783e81..7bf1a9e8 100644
--- a/openrtx/src/core/voicePromptUtils.c
+++ b/openrtx/src/core/voicePromptUtils.c
@@ -595,7 +595,7 @@ void vp_announceGPSInfo(vpGPSInfoFlags_t gpsInfoFlags)
         addSilenceIfNeeded(flags);
     }
     
-    char buffer[16] = "\0";
+    char buffer[17] = "\0";
     
     if (gpsInfoFlags & vpGPSSpeed)
     {