diff --git a/src/pixel_minimap.cpp b/src/pixel_minimap.cpp
index c983bdc93dfd8..a469e3f4d9470 100644
--- a/src/pixel_minimap.cpp
+++ b/src/pixel_minimap.cpp
@@ -506,7 +506,8 @@ void pixel_minimap::render_critters( const tripoint &center )
         mixture = lerp_clamped( 0, 100, std::max( s, 0.0f ) );
     }
 
-    const level_cache &access_cache = get_map().access_cache( center.z );
+    const map &m = get_map();
+    const level_cache &access_cache = m.access_cache( center.z );
 
     const point start( center.x - total_tiles_count.x / 2, center.y - total_tiles_count.y / 2 );
     const point beacon_size = {
@@ -518,6 +519,10 @@ void pixel_minimap::render_critters( const tripoint &center )
     for( int y = 0; y < total_tiles_count.y; y++ ) {
         for( int x = 0; x < total_tiles_count.x; x++ ) {
             const tripoint p = start + tripoint( x, y, center.z );
+            if( !m.inbounds( p ) ) {
+                // p might be out-of-bounds when peeking at submap boundary. Example: center=(64,59,-5), start=(4,-1) -> p=(4,-1,-5)
+                continue;
+            }
             const lit_level lighting = access_cache.visibility_cache[p.x][p.y];
 
             if( lighting == lit_level::DARK || lighting == lit_level::BLANK ) {