diff --git a/kitty/data-types.h b/kitty/data-types.h
index 77c939dca..2870f814f 100644
--- a/kitty/data-types.h
+++ b/kitty/data-types.h
@@ -232,6 +232,16 @@ typedef struct {
         clear_sprite_position((line)->cells[(at)]); \
     }
 
+#define ensure_space_for(base, array, type, num, capacity, initial_cap, zero_mem) \
+    if ((base)->capacity < num) { \
+        size_t _newcap = MAX(initial_cap, MAX(2 * (base)->capacity, num)); \
+        (base)->array = realloc((base)->array, sizeof(type) * _newcap); \
+        if ((base)->array == NULL) fatal("Out of memory while ensuring space in array"); \
+        if (zero_mem) memset((base)->array + (base)->capacity, 0, sizeof(type) * (_newcap - (base)->capacity)); \
+        (base)->capacity = _newcap; \
+    }
+
+
 // Global functions 
 const char* base64_decode(const uint32_t *src, size_t src_sz, uint8_t *dest, size_t dest_capacity, size_t *dest_sz);
 Line* alloc_line();
diff --git a/kitty/graphics.c b/kitty/graphics.c
index c403dca1e..9ea81bdbd 100644
--- a/kitty/graphics.c
+++ b/kitty/graphics.c
@@ -23,15 +23,6 @@ PyTypeObject GraphicsManager_Type;
 
 #define REPORT_ERROR(...) { fprintf(stderr, __VA_ARGS__); fprintf(stderr, "\n"); }
 
-#define ensure_space_for(base, array, type, num, capacity, initial_cap, zero_mem) \
-    if (base->capacity < num) { \
-        size_t _newcap = MAX(initial_cap, MAX(2 * base->capacity, num)); \
-        base->array = realloc(base->array, sizeof(type) * _newcap); \
-        if (base->array == NULL) fatal("Out of memory while ensuring space in array"); \
-        if (zero_mem) memset(base->array + base->capacity, 0, sizeof(type) * (_newcap - base->capacity)); \
-        base->capacity = _newcap; \
-    }
-
 
 static bool send_to_gpu = true;