diff --git a/graphics/libemf/Makefile b/graphics/libemf/Makefile
index 8548082ed7a5..acc1b9079707 100644
--- a/graphics/libemf/Makefile
+++ b/graphics/libemf/Makefile
@@ -10,8 +10,6 @@ WWW=		http://libemf.sourceforge.net/
 
 LICENSE=	LGPL21
 
-BROKEN_riscv64=		fails to build: ../include/libEMF/wine/winnt.h:77:3: Unknown CPU architecture
-
 OPTIONS_DEFINE=	DOCS
 
 USES=		cpe libtool
diff --git a/graphics/libemf/files/patch-include_libEMF_wine_winnt.h b/graphics/libemf/files/patch-include_libEMF_wine_winnt.h
new file mode 100644
index 000000000000..66804ae95911
--- /dev/null
+++ b/graphics/libemf/files/patch-include_libEMF_wine_winnt.h
@@ -0,0 +1,85 @@
+--- include/libEMF/wine/winnt.h.orig	2022-10-27 16:15:39 UTC
++++ include/libEMF/wine/winnt.h
+@@ -69,6 +69,10 @@
+ # define  WORDS_BIGENDIAN
+ # define  BITFIELDS_BIGENDIAN
+ # undef  ALLOW_UNALIGNED_ACCESS
++#elif defined(__riscv)
++# undef  WORDS_BIGENDIAN
++# undef  BITFIELDS_BIGENDIAN
++# define ALLOW_UNALIGNED_ACCESS
+ #elif !defined(RC_INVOKED)
+ # error Unknown CPU architecture!
+ #endif
+@@ -1581,6 +1585,71 @@ typedef struct _CONTEXT {
+ } CONTEXT;
+ 
+ #endif /* __e2k__ */
++
++#if __riscv_xlen == 64
++/*
++ * FIXME:
++ *
++ * There is not yet an official CONTEXT structure defined for 
++ * RV64, so I just made one up.
++ *
++ */
++
++#define CONTEXT_RV64            0x4000000
++#define CONTEXT_CONTROL         (CONTEXT_RV64 | 0x00000001)
++#define CONTEXT_INTEGER         (CONTEXT_RV64 | 0x00000002)
++#define CONTEXT_FLOATING_POINT  (CONTEXT_RV64 | 0x00000004)
++
++#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_FLOATING_POINT)
++
++#define EXCEPTION_READ_FAULT    0
++#define EXCEPTION_WRITE_FAULT   1
++#define EXCEPTION_EXECUTE_FAULT 8
++
++typedef struct _CONTEXT {
++    ULONG ContextFlags;
++
++    /* This section is specified/returned if the ContextFlags word contains
++       the flag CONTEXT_INTEGER. */
++    ULONGLONG R1;
++    ULONGLONG R2;
++    ULONGLONG R3;
++    ULONGLONG R4;
++    ULONGLONG R5;
++    ULONGLONG R6;
++    ULONGLONG R7;
++    ULONGLONG R8;
++    ULONGLONG R9;
++    ULONGLONG R10;
++    ULONGLONG R12;
++    ULONGLONG R13;
++    ULONGLONG R14;
++    ULONGLONG R15;
++    ULONGLONG R16;
++    ULONGLONG R17;
++    ULONGLONG R18;
++    ULONGLONG R19;
++    ULONGLONG R20;
++    ULONGLONG R21;
++    ULONGLONG R22;
++    ULONGLONG R23;
++    ULONGLONG R24;
++    ULONGLONG R25;
++    ULONGLONG R26;
++    ULONGLONG R27;
++    ULONGLONG R28;
++    ULONGLONG R29;
++    ULONGLONG R30;
++    ULONGLONG R31;
++
++    /* These are selected by CONTEXT_CONTROL */
++    ULONGLONG Pc;
++
++    /* These are selected by CONTEXT_FLOATING_POINT */
++
++} CONTEXT;
++
++#endif /* __riscv */
+ 
+ #if !defined(CONTEXT_FULL) && !defined(RC_INVOKED)
+ #error You need to define a CONTEXT for your CPU