diff --git a/configs/broadwell b/configs/broadwell
index 9921ff8c6a..a8aa58a58b 100644
--- a/configs/broadwell
+++ b/configs/broadwell
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Broadwell
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/broadwell_ult b/configs/broadwell_ult
index 0860a1c8e4..3507a41bed 100644
--- a/configs/broadwell_ult
+++ b/configs/broadwell_ult
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Broadwell
 CONFIG_GFX_GMA_CPU_VARIANT	= ULT
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/haswell b/configs/haswell
index e4a5c04aa6..d28168ca7c 100644
--- a/configs/haswell
+++ b/configs/haswell
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Haswell
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/haswell_ult b/configs/haswell_ult
index d9c483ea52..3ba633afb7 100644
--- a/configs/haswell_ult
+++ b/configs/haswell_ult
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Haswell
 CONFIG_GFX_GMA_CPU_VARIANT	= ULT
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/ironlake b/configs/ironlake
index 8a4e66a602..d29d71c492 100644
--- a/configs/ironlake
+++ b/configs/ironlake
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Ironlake
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= LVDS
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/ivybridge_edp b/configs/ivybridge_edp
index 32ce3d6df2..257b59c1dc 100644
--- a/configs/ivybridge_edp
+++ b/configs/ivybridge_edp
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Ivybridge
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/ivybridge_lvds b/configs/ivybridge_lvds
index 930a009f63..43276523b3 100644
--- a/configs/ivybridge_lvds
+++ b/configs/ivybridge_lvds
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Ivybridge
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= LVDS
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/sandybridge b/configs/sandybridge
index 7d8075f5cd..2bdce64d60 100644
--- a/configs/sandybridge
+++ b/configs/sandybridge
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Sandybridge
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= LVDS
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/skylake b/configs/skylake
index 4577c8452d..12ca51400a 100644
--- a/configs/skylake
+++ b/configs/skylake
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Skylake
 CONFIG_GFX_GMA_CPU_VARIANT	= Normal
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#
diff --git a/configs/skylake_ult b/configs/skylake_ult
index 5e67484550..94d1161de0 100644
--- a/configs/skylake_ult
+++ b/configs/skylake_ult
@@ -2,4 +2,4 @@ CONFIG_GFX_GMA_CPU		= Skylake
 CONFIG_GFX_GMA_CPU_VARIANT	= ULT
 CONFIG_GFX_GMA_INTERNAL_PORT	= DP
 CONFIG_GFX_GMA_ANALOG_I2C_PORT	= PCH_DAC
-CONFIG_GFX_GMA_DEFAULT_MMIO	= 16#e000_0000#
+CONFIG_GFX_GMA_DEFAULT_MMIO	= 16\#e000_0000\#