diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index 36ff06d4df15..aad270b76311 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -28,8 +28,6 @@
 
 #include "common.h"
 
-extern void __init isa_init_irq(unsigned int irq);
-
 unsigned int mem_fclk_21285 = 50000000;
 
 EXPORT_SYMBOL(mem_fclk_21285);
diff --git a/arch/arm/mach-footbridge/common.h b/arch/arm/mach-footbridge/common.h
index 580e31bbc711..b05e662d21ad 100644
--- a/arch/arm/mach-footbridge/common.h
+++ b/arch/arm/mach-footbridge/common.h
@@ -7,3 +7,4 @@ extern void isa_rtc_init(void);
 extern void footbridge_map_io(void);
 extern void footbridge_init_irq(void);
 
+extern void isa_init_irq(unsigned int irq);
diff --git a/arch/arm/mach-footbridge/isa-irq.c b/arch/arm/mach-footbridge/isa-irq.c
index 9ee80a211d3c..8bfd06aeb64d 100644
--- a/arch/arm/mach-footbridge/isa-irq.c
+++ b/arch/arm/mach-footbridge/isa-irq.c
@@ -28,6 +28,8 @@
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 
+#include "common.h"
+
 static void isa_mask_pic_lo_irq(unsigned int irq)
 {
 	unsigned int mask = 1 << (irq & 7);