diff --git a/src/external/rl_gputex.h b/src/external/rl_gputex.h
index 29500f3cf..78d618db5 100644
--- a/src/external/rl_gputex.h
+++ b/src/external/rl_gputex.h
@@ -308,7 +308,7 @@ void *rl_load_dds_from_memory(const unsigned char *file_data, unsigned int file_
                         unsigned char alpha = 0;
 
                         // NOTE: Data comes as A1R5G5B5, it must be reordered to R5G5B5A1
-                        for (int i = 0; i < image_pixel_size; i++)
+                        for (int i = 0; i < data_size/sizeof(unsigned short); i++)
                         {
                             alpha = ((unsigned short *)image_data)[i] >> 15;
                             ((unsigned short *)image_data)[i] = ((unsigned short *)image_data)[i] << 1;
@@ -328,7 +328,7 @@ void *rl_load_dds_from_memory(const unsigned char *file_data, unsigned int file_
                         unsigned char alpha = 0;
 
                         // NOTE: Data comes as A4R4G4B4, it must be reordered R4G4B4A4
-                        for (int i = 0; i < image_pixel_size; i++)
+                        for (int i = 0; i < data_size/sizeof(unsigned short); i++)
                         {
                             alpha = ((unsigned short *)image_data)[i] >> 12;
                             ((unsigned short *)image_data)[i] = ((unsigned short *)image_data)[i] << 4;
@@ -362,7 +362,7 @@ void *rl_load_dds_from_memory(const unsigned char *file_data, unsigned int file_
                 // NOTE: Data comes as A8R8G8B8, it must be reordered R8G8B8A8 (view next comment)
                 // DirecX understand ARGB as a 32bit DWORD but the actual memory byte alignment is BGRA
                 // So, we must realign B8G8R8A8 to R8G8B8A8
-                for (int i = 0; i < image_pixel_size*4; i += 4)
+                for (int i = 0; i < data_size; i += 4)
                 {
                     blue = ((unsigned char *)image_data)[i];
                     ((unsigned char *)image_data)[i] = ((unsigned char *)image_data)[i + 2];