diff --git a/include/asm-mips/mach-generic/spaces.h b/include/asm-mips/mach-generic/spaces.h
index 5a2c1efb4eb7bf47a3c2212263f69c7bb7337616..b849d8dd7e7848f5cb5873c2f579412f043752f2 100644
--- a/include/asm-mips/mach-generic/spaces.h
+++ b/include/asm-mips/mach-generic/spaces.h
@@ -55,13 +55,13 @@
 #endif
 
 #ifdef CONFIG_DMA_NONCOHERENT
-#define CAC_BASE		0x9800000000000000
+#define CAC_BASE		0x9800000000000000UL
 #else
-#define CAC_BASE		0xa800000000000000
+#define CAC_BASE		0xa800000000000000UL
 #endif
-#define IO_BASE			0x9000000000000000
-#define UNCAC_BASE		0x9000000000000000
-#define MAP_BASE		0xc000000000000000
+#define IO_BASE			0x9000000000000000UL
+#define UNCAC_BASE		0x9000000000000000UL
+#define MAP_BASE		0xc000000000000000UL
 
 #define TO_PHYS(x)		(             ((x) & TO_PHYS_MASK))
 #define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
diff --git a/include/asm-mips/mach-ip32/spaces.h b/include/asm-mips/mach-ip32/spaces.h
index c7839f85c68d2949a0f324d2d19bf1a13dd181e6..44abe5c0238997b942a71f85b3cfab39c649e348 100644
--- a/include/asm-mips/mach-ip32/spaces.h
+++ b/include/asm-mips/mach-ip32/spaces.h
@@ -19,10 +19,10 @@
 #define HIGHMEM_START		(1UL << 59UL)
 #endif
 
-#define CAC_BASE		0x9800000000000000
-#define IO_BASE			0x9000000000000000
-#define UNCAC_BASE		0x9000000000000000
-#define MAP_BASE		0xc000000000000000
+#define CAC_BASE		0x9800000000000000UL
+#define IO_BASE			0x9000000000000000UL
+#define UNCAC_BASE		0x9000000000000000UL
+#define MAP_BASE		0xc000000000000000UL
 
 #define TO_PHYS(x)		(             ((x) & TO_PHYS_MASK))
 #define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))