Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -238,9 +238,10 @@
 FRAMEWORK_LIBS := -Fruntime				\
 		  ${RUNTIME_FRAMEWORK_LIBS}		\
 		  ${REEXPORT_RUNTIME_FRAMEWORK}		\
 		  ${LIBS}
 LIBS := -Lruntime ${RUNTIME_LIBS} ${REEXPORT_RUNTIME} ${LIBS}
-RCFLAGS = -DOBJFW_LIB_MAJOR=${OBJFW_LIB_MAJOR}				 \
-	  -DOBJFW_LIB_MINOR=${OBJFW_LIB_MINOR}				 \
-	  -DOBJFW_LIB_VERSION=\"${OBJFW_LIB_MANJOR}.${OBJFW_LIB_MINOR}\" \
+RCFLAGS = --use-temp-file						\
+	  -DOBJFW_LIB_MAJOR=${OBJFW_LIB_MAJOR}				\
+	  -DOBJFW_LIB_MINOR=${OBJFW_LIB_MINOR}				\
+	  -DOBJFW_LIB_VERSION=\"${OBJFW_LIB_MAJOR}.${OBJFW_LIB_MINOR}\" \
 	  -DOBJFW_SHARED_LIB=\"${OBJFW_SHARED_LIB}\"

Index: src/runtime/Makefile
==================================================================
--- src/runtime/Makefile
+++ src/runtime/Makefile
@@ -56,9 +56,10 @@
 	    -DOBJFWRT_LIB_MAJOR=${OBJFWRT_LIB_MAJOR}		\
 	    -DOBJFWRT_LIB_MINOR=${OBJFWRT_LIB_MINOR}
 AMIGA_LIB_CFLAGS += -DOBJC_COMPILING_AMIGA_LIBRARY
 LD = ${OBJC}
 FRAMEWORK_LIBS = ${LIBS}
-RCFLAGS = -DOBJFWRT_LIB_MAJOR=${OBJFWRT_LIB_MAJOR}			       \
-	  -DOBJFWRT_LIB_MINOR=${OBJFWRT_LIB_MINOR}			       \
-	  -DOBJFWRT_LIB_VERSION=\"${OBJFWRT_LIB_MANJOR}.${OBJFWRT_LIB_MINOR}\" \
+RCFLAGS = --use-temp-file						      \
+	  -DOBJFWRT_LIB_MAJOR=${OBJFWRT_LIB_MAJOR}			      \
+	  -DOBJFWRT_LIB_MINOR=${OBJFWRT_LIB_MINOR}			      \
+	  -DOBJFWRT_LIB_VERSION=\"${OBJFWRT_LIB_MAJOR}.${OBJFWRT_LIB_MINOR}\" \
 	  -DOBJFWRT_SHARED_LIB=\"${OBJFWRT_SHARED_LIB}\"