diff --git a/include/libopencm3/lpc43xx/gpdma.h b/include/libopencm3/lpc43xx/gpdma.h
index 066587fe..9df66989 100644
--- a/include/libopencm3/lpc43xx/gpdma.h
+++ b/include/libopencm3/lpc43xx/gpdma.h
@@ -507,12 +507,12 @@
 #define GPDMA_CxCONFIG_SRCPERIPHERAL_SHIFT (1)
 #define GPDMA_CxCONFIG_SRCPERIPHERAL_MASK \
 			(0x1f << GPDMA_CxCONFIG_SRCPERIPHERAL_SHIFT)
-#define GPDMA_CxCONFIG_SRCPERIPHERAL(x)
+#define GPDMA_CxCONFIG_SRCPERIPHERAL(x) \
 			((x) << GPDMA_CxCONFIG_SRCPERIPHERAL_SHIFT)
 
 /* DESTPERIPHERAL: Destination peripheral */
 #define GPDMA_CxCONFIG_DESTPERIPHERAL_SHIFT (6)
-#define GPDMA_CxCONFIG_DESTPERIPHERAL_MASK
+#define GPDMA_CxCONFIG_DESTPERIPHERAL_MASK \
 			(0x1f << GPDMA_CxCONFIG_DESTPERIPHERAL_SHIFT)
 #define GPDMA_CxCONFIG_DESTPERIPHERAL(x) \
 			((x) << GPDMA_CxCONFIG_DESTPERIPHERAL_SHIFT)
diff --git a/include/libopencm3/lpc43xx/sgpio.h b/include/libopencm3/lpc43xx/sgpio.h
index e8be60c9..4b8d5b68 100644
--- a/include/libopencm3/lpc43xx/sgpio.h
+++ b/include/libopencm3/lpc43xx/sgpio.h
@@ -483,7 +483,7 @@ LGPL License Terms @ref lgpl_license
 #define SGPIO_MUX_CFGx_CLK_SOURCE_SLICE_MODE_SHIFT	(3)
 #define SGPIO_MUX_CFGx_CLK_SOURCE_SLICE_MODE_MASK \
 			(0x3 << SGPIO_MUX_CFGx_CLK_SOURCE_SLICE_MODE_SHIFT)
-#define SGPIO_MUX_CFGx_CLK_SOURCE_SLICE_MODE(x)
+#define SGPIO_MUX_CFGx_CLK_SOURCE_SLICE_MODE(x) \
 			((x) << SGPIO_MUX_CFGx_CLK_SOURCE_SLICE_MODE_SHIFT)
 
 /* QUALIFIER_MODE: Select qualifier mode */