diff --git a/glfw/internal.h b/glfw/internal.h
index 7cee164af..9b6d50b9f 100644
--- a/glfw/internal.h
+++ b/glfw/internal.h
@@ -199,7 +199,7 @@ typedef void (APIENTRY * PFN_vkVoidFunction)(void);
 #define remove_i_from_array(array, i, count) { \
     count--; \
     if (i < count) { \
-        memmove(array + i, array + i + 1, sizeof(array[0]) * (count - 1)); \
+        memmove(array + i, array + i + 1, sizeof(array[0]) * (count - i)); \
     }}
 
 // Constructs a version number string from the public header macros
diff --git a/kitty/data-types.h b/kitty/data-types.h
index 68f5a91fc..f9ce1e834 100644
--- a/kitty/data-types.h
+++ b/kitty/data-types.h
@@ -261,7 +261,7 @@ typedef struct {FONTS_DATA_HEAD} *FONTS_DATA_HANDLE;
 #define remove_i_from_array(array, i, count) { \
     count--; \
     if (i < count) { \
-        memmove(array + i, array + i + 1, sizeof(array[0]) * (count - 1)); \
+        memmove(array + i, array + i + 1, sizeof(array[0]) * (count - i)); \
     }}
 
 // Global functions