diff --git a/libdha/sysdep/AsmMacros_x86.h b/libdha/sysdep/AsmMacros_x86.h
index 3259de03f9..c2ab1dc217 100644
--- a/libdha/sysdep/AsmMacros_x86.h
+++ b/libdha/sysdep/AsmMacros_x86.h
@@ -25,6 +25,16 @@ extern int dhahelper_initialized;
 #include <sys/ioctl.h>
 #include <svgalib_helper.h>
 
+#ifndef SVGALIB_HELPER_IOC_MAGIC
+/* svgalib 1.9.18+ compatibility ::atmos */
+#define SVGALIB_HELPER_IOCSOUTB	SVGAHELPER_OUTB
+#define SVGALIB_HELPER_IOCSOUTW	SVGAHELPER_OUTW
+#define SVGALIB_HELPER_IOCSOUTL	SVGAHELPER_OUTL
+#define SVGALIB_HELPER_IOCGINB	SVGAHELPER_INB
+#define SVGALIB_HELPER_IOCGINW	SVGAHELPER_INW
+#define SVGALIB_HELPER_IOCGINL	SVGAHELPER_INL
+#endif
+
 extern int svgahelper_fd;
 extern int svgahelper_initialized;
 
diff --git a/libdha/sysdep/pci_linux.c b/libdha/sysdep/pci_linux.c
index a4486dd041..7d27fc073f 100644
--- a/libdha/sysdep/pci_linux.c
+++ b/libdha/sysdep/pci_linux.c
@@ -26,6 +26,10 @@ int dhahelper_fd = 0;
 #include <linux/ioctl.h>
 #endif
 #include <fcntl.h>
+#ifndef SVGALIB_HELPER_IOC_MAGIC
+/* svgalib 1.9.18+ compatibility ::atmos */
+#define SVGALIB_HELPER_IOCGPCIINL SVGAHELPER_PCIINL
+#endif
 int svgahelper_initialized = 0;
 int svgahelper_fd = 0;