diff --git a/Core/sm83_cpu.c b/Core/sm83_cpu.c
index 4caaa34..49115c7 100644
--- a/Core/sm83_cpu.c
+++ b/Core/sm83_cpu.c
@@ -211,7 +211,7 @@ static void cycle_write(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
             /* Handle disabling objects while already fetching an object */
             if ((old_value & 2) && !(value & 2)) {
                 if (gb->during_object_fetch) {
-                    gb->cycles_for_line -= gb->display_cycles;
+                    gb->cycles_for_line += gb->display_cycles;
                     gb->display_cycles = 0;
                     gb->object_fetch_aborted = true;
                 }
@@ -226,7 +226,7 @@ static void cycle_write(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
             /* Handle disabling objects while already fetching an object */
             if ((old_value & 2) && !(value & 2)) {
                 if (gb->during_object_fetch) {
-                    gb->cycles_for_line -= gb->display_cycles;
+                    gb->cycles_for_line += gb->display_cycles;
                     gb->display_cycles = 0;
                     gb->object_fetch_aborted = true;
                 }
@@ -244,7 +244,7 @@ static void cycle_write(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
             /* Handle disabling objects while already fetching an object */
             if ((old_value & 2) && !(value & 2)) {
                 if (gb->during_object_fetch) {
-                    gb->cycles_for_line -= gb->display_cycles;
+                    gb->cycles_for_line += gb->display_cycles;
                     gb->display_cycles = 0;
                     gb->object_fetch_aborted = true;
                 }
@@ -253,7 +253,7 @@ static void cycle_write(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
             /* Handle disabling objects while already fetching an object */
             if ((old_value & 2) && !(value & 2)) {
                 if (gb->during_object_fetch) {
-                    gb->cycles_for_line -= gb->display_cycles;
+                    gb->cycles_for_line += gb->display_cycles;
                     gb->display_cycles = 0;
                     gb->object_fetch_aborted = true;
                 }