diff --git a/soc/arm/atmel_sam0/common/gmac_fixup_samd5x.h b/soc/arm/atmel_sam0/common/gmac_fixup_samd5x.h
new file mode 100644
index 00000000000..8a21adfecf7
--- /dev/null
+++ b/soc/arm/atmel_sam0/common/gmac_fixup_samd5x.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2020 Stephanos Ioannidis <root@stephanos.io>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * The following GMAC clock configuration fix-up symbols map to the applicable
+ * APB-specific symbols, in order to accommodate different SoC series with the
+ * GMAC core connected to different APBs.
+ */
+#ifdef MCLK_APBAMASK_GMAC
+#define MCLK_GMAC (&MCLK->APBAMASK.reg)
+#define MCLK_GMAC_MASK (MCLK_APBAMASK_GMAC)
+#endif
+#ifdef MCLK_APBBMASK_GMAC
+#define MCLK_GMAC (&MCLK->APBBMASK.reg)
+#define MCLK_GMAC_MASK (MCLK_APBBMASK_GMAC)
+#endif
+#ifdef MCLK_APBCMASK_GMAC
+#define MCLK_GMAC (&MCLK->APBCMASK.reg)
+#define MCLK_GMAC_MASK (MCLK_APBCMASK_GMAC)
+#endif
+#ifdef MCLK_APBDMASK_GMAC
+#define MCLK_GMAC (&MCLK->APBDMASK.reg)
+#define MCLK_GMAC_MASK (MCLK_APBDMASK_GMAC)
+#endif
diff --git a/soc/arm/atmel_sam0/same53/soc.h b/soc/arm/atmel_sam0/same53/soc.h
index e53f267dd07..8eb9ca427e6 100644
--- a/soc/arm/atmel_sam0/same53/soc.h
+++ b/soc/arm/atmel_sam0/same53/soc.h
@@ -31,6 +31,7 @@
 
 #include "sercom_fixup_samd5x.h"
 #include "tc_fixup_samd5x.h"
+#include "gmac_fixup_samd5x.h"
 
 #define SOC_ATMEL_SAM0_OSC32K_FREQ_HZ 32768
 
diff --git a/soc/arm/atmel_sam0/same54/soc.h b/soc/arm/atmel_sam0/same54/soc.h
index f8aa4e8b042..6de7230652e 100644
--- a/soc/arm/atmel_sam0/same54/soc.h
+++ b/soc/arm/atmel_sam0/same54/soc.h
@@ -29,6 +29,7 @@
 
 #include "sercom_fixup_samd5x.h"
 #include "tc_fixup_samd5x.h"
+#include "gmac_fixup_samd5x.h"
 
 #define SOC_ATMEL_SAM0_OSC32K_FREQ_HZ 32768