Index: uspace/lib/c/arch/amd64/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/amd64/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/amd64/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_SP   0x00
@@ -59,3 +60,4 @@
 
 #endif
+#endif
 
Index: uspace/lib/c/arch/arm32/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/arm32/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/arm32/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #include <stdint.h>
@@ -54,2 +55,4 @@
 } context_t;
 
+#endif
+
Index: uspace/lib/c/arch/ia32/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/ia32/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/ia32/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_SP   0x00
@@ -53,3 +54,4 @@
 
 #endif
+#endif
 
Index: uspace/lib/c/arch/ia64/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/ia64/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/ia64/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_AR_PFS          0x000
@@ -132,3 +133,4 @@
 
 #endif  /* __ASSEMBLER__ */
+#endif
 
Index: uspace/lib/c/arch/mips32/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/mips32/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/mips32/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_SP   0x00
@@ -88,3 +89,4 @@
 
 #endif
+#endif
 
Index: uspace/lib/c/arch/ppc32/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/ppc32/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/ppc32/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_SP   0x00
@@ -85,3 +86,4 @@
 
 #endif
+#endif
 
Index: uspace/lib/c/arch/riscv64/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/riscv64/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/riscv64/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_SP   0x00
@@ -110,3 +111,4 @@
 
 #endif
+#endif
 
Index: uspace/lib/c/arch/sparc64/include/libarch/fibril_context.h
===================================================================
--- uspace/lib/c/arch/sparc64/include/libarch/fibril_context.h	(revision 30e9f42a78ab720d6d4fc7f8484c61c6b7964bdd)
+++ uspace/lib/c/arch/sparc64/include/libarch/fibril_context.h	(revision d9fdd5aada2408706403a3f04ab550635bfc5907)
@@ -26,5 +26,6 @@
  */
 
-#pragma once
+#ifndef LIBC_ARCH_FIBRIL_CONTEXT_H_
+#define LIBC_ARCH_FIBRIL_CONTEXT_H_
 
 #define CONTEXT_OFFSET_SP  0x00
@@ -77,3 +78,4 @@
 
 #endif
+#endif