--- a/include/ops.h
+++ b/include/ops.h
@@ -39,8 +39,8 @@
 #ifndef __X86EMU_OPS_H
 #define __X86EMU_OPS_H
 
-void (*x86emu_optab[0x100])(u8 op1) L_SYM;
-void (*x86emu_optab2[0x100])(u8 op2) L_SYM;
+extern void (*x86emu_optab[0x100])(u8 op1) L_SYM;
+extern void (*x86emu_optab2[0x100])(u8 op2) L_SYM;
 
 void decode_cond(int type) L_SYM;